Medicine response assay in respiratory disease

ABSTRACT

Correlations between polymorphisms in the 5-lipoxygenase gene, or polymorphisms in the leukotriene C4 synthase gene, and a subject&#39;s phenotypic response to treatment with a leukotriene receptor antagonist for respiratory disease are described. Methods of screening subjects to aid in treatment, and methods of screening therapeutic compounds, are presented.

FIELD OF THE INVENTION

[0001] The present studies relate to polymorphisms in genes that play a role in the biosynthesis of sulfidopeptide leukotrienes, and phenotypes that are associated or correlated therewith. More particularly, the present studies relate to the correlation of such polymorphisms to the response of subjects with respiratory disorders (such as asthma) to pharmaceutical treatment. The present studies further relate to methods of screening compounds for pharmaceutical activity. The present studies also relate to methods of genotyping subjects for predictive purposes.

BACKGROUND OF THE INVENTION

[0002] Asthma is an extremely common disorder accounting for 1 to 3% of all office visits, 500,000 hospital admissions per year and more pediatric hospital admissions than any other single illness. Asthma is no longer simply viewed as reversible airway obstruction or irritable airways. Rather, it is viewed primarily as an inflammatory illness that has bronchial hyperreactivity and bronchospasm as a result. The asthmatic inflammation that underlies the disease can be addressed by therapy with anti-inflammatory agents such as glucocorticoids or by those agents that target the role of the leukotrienes in the inflammation process.

[0003] The leukotrienes are a family of eicosatetraenoic acids derived from arachidonic acid which exhibit a wide range of pharmacological and physiological activities including bronchoconstriction and proinflammatory activity. Arachidonic acid is cleaved from the cell membrane, and acted upon by a cascade of enzymes localized to the perinuclear membrane including 5-lipoxygenase (ALOX5) which forms an unstable epoxide LTC4, followed by the addition of glutathione by LTC4 Synthase (LTC4S) forming the intercellular LTC4. LTC4 is transported extracellularly, where an amino acid is sequentially cleaved to form cystinyl leukotrienes LTD4 and LTE4. The cystinyl leukotrienes LTD4 and LTE4 act through the CYS-LT1 receptor. Two classes of drugs exist to modulate this pathway, ALOX5 inhibitors and CYSLT1 receptor antagonists.

[0004] A polymorphism in the promoter region of the ALOX5 gene has been demonstrated to affect the transcription of this gene. In vitro, human cells containing other than 5 random repeats of the Sp-1 binding motif (GGGCGG) have diminished activity. It follows that patients with asthma that have a variant genotype would be less responsive to therapeutic intervention with agents modifying this pathway. Prior clinical trials with the ALOX5 inhibitor compound ABT-761 have determined that efficacy of the compound is affected by genotype (Drazen, J. M. et al Pharmacogenetic association between ALOX5 promoter genotype and the response to anti-asthma treatment. Nature Genetics 22;168-170, 1999). Patients that were either homozygous for the wild type allele (5 tandem repeats of the Sp-1 motif) or heterozygous (5/any other number of tandem repeats) had similar efficacy. However, the patients that were homozygous for no wild type alleles (variants) had a greatly reduced response to the compound. See FIG. 1 (which graphs data provided in Drazen et al. (1999) at page 168, column 2, last paragraph, continuing to page 169). In FIG. 1, homozygous for the wild type allele is denoted 5,5; heterozygous the wild and variant alleles is denoted 5,X; and homozygous for variant alleles is denoted X,X.

[0005] There is a need for a method of determining whether a given asthma patient would or would not be a good candidate for treatment with a leukotriene pathway modulator. It is therefore a goal of the present invention to provide an association between optimum clinical outcome of pharmacologic therapy and the genotype of the individual population. It is another goal of the present invention to be able to stratify patient populations into those subsets that will respond to a given pharmacologic therapy more or less well relative to other pharmacologic therapies. Another goal of the present invention is to be able to predict a patient's response to a given pharmacologic therapy on the basis of that patient's genotype. An additional goal of the present invention is to provide for a commercial method of predicting patient responses to pharmacologic therapies. Yet another goal of the present invention is to provide a method of screening candidate drug compounds for future suitable administration to a patient or to a patient population, based upon the genotype of the patient or the population. This entails a method of screening candidate drug compounds for variations in a measurable phenotypic effect among genetic subpopulations of subjects with asthma.

SUMMARY OF THE INVENTION

[0006] The present inventors have determined that in subjects with respiratory disorders that are potentially treatable with leukotriene receptor antagonists, polymorphisms in the 5-lipoxygenase (ALOX5) gene and/or the leukotriene C₄ synthase gene (LTC4S) are correlated with the response of the subjects to pharmacologic therapy with a leukotriene receptor antagonist. More particularly, they have found that a transversion polymorphism in the promoter region of the LTC4S gene is a predictor for the response of patients with asthma to treatment with a CysLT1 leukotriene receptor antagonist, and they have found that a polymorphic variation in the number of tandem repeats of a Sp-1 binding motif in the promoter region of the ALOX5 gene, as well as other transversion polymorphisms, likewise are predictors for the response of patients with asthma to treatment with a CysLT1 leukotriene receptor antagonist; and furthermore, they have identified a genetic subset of asthma patients who display a lower incidence of relief of asthma symptoms when treated with a leukotriene receptor antagonist as compared to alternative pharmacologic therapies.

[0007] A first aspect of the present invention is a method of screening a patient population to identify those subjects with an decreased likelihood of responding favorably to treatment with a leukotriene antagonist for a respiratory disease such as asthma. The subjects may have been previously diagnosed with the respiratory disease, or the screening may be used in conjunction with diagnostic efforts.

[0008] A further aspect of the present invention is a method of screening a subject with a respiratory disease that is treatable with leukotriene receptor antagonists (such as asthma), as an aid in predicting the subject's response to treatment with a leukotriene receptor antagonist. The method comprises obtaining a sample of the subject's DNA and determining the genotype of the subject at a polymorphic allelic site in either one or both of the ALOX5 gene or the LTC4S gene, where different genotypes at that site have been associated with different incidences of a phenotypic response to treatment with a leukotriene receptor antagonist.

[0009] A further aspect of the present invention is a method of screening a subject suffering from asthma that is treatable with a leukotriene receptor antagonist ligand, as an aid in predicting the subject's response to treatment with that leukotriene receptor antagonist. The method comprises obtaining a sample of the subject's DNA and determining the genotype of the subject at a polymorphic allelic site in either or both of the ALOX5 gene and the LTC4S gene, where different genotypes at that site have been associated with different incidences of a phenotypic response to treatment with a leukotriene receptor antagonist. The genotype that is detected in the sample indicates that the subject is likely to have the phenotypic response associated with that genotype.

[0010] A further aspect of the present invention is a method of screening a ligand for variations in measurable phenotypic effects among genetic subpopulations of subjects with a respiratory disorder. The method comprises administering the candidate ligand to a population of subjects suffering from the respiratory disorder, and obtaining DNA samples from each of the subjects. The DNA samples are genotyped for a polymorphic allele of the ALOX5 gene and/or the LTC4S gene, and correlations between the polymorphic allele genotype and the occurrence of a phenotypic response in the population of subjects are determined. Detection of a genotype that is correlated with an increased or decreased incidence of a desired therapeutic response or a side effect (compared to the incidence in subjects with alternative genotypes) indicates that the effectiveness of the ligand in treating the respiratory disease varies among genetic subpopulations.

[0011] Clinical trials of the type discussed in this application generate various kinds of data that is advantageously stored on electronically readable media, including, but not limited to magnetic tapes, magnetic disks, solid state memory and storage devices, optically readable disks and any combination of these. Such data is also advantageously transmitted or communicated via telecommunications means including metallic or optical fiber lines or via wireless electromagnetic frequency devices. Additionally, such data is advantageously communicated via at least two or more electronic computing devices, including personal computers, computer workstations, computer servers, mainframe computers, super computers and the like. Such communications can occur either directly from device to device or through a plurality of such devices that have been electronically instructed on how to route such communications from a sender to a designated receiver of such communication, including, but not limited to, organizational intranets and the internet or the world wide web. Such data that can be stored and communicated in the above ways include, but are not limited to, any nucleotide sequence data, amino acid sequence data, protein-protein interaction data, clinical diagnosis data or statistics data generated by the above clinical trials. The use of such electronic devices as described is an alternative embodiment of the invention claimed herein, particularly when used commercially.

[0012] Additionally, the present invention affords a way of designing and conducting clinical trials in such a way as to take advantage of those patients who do not respond to a leukotriene receptor antagonist, by re-testing that population in a way calculated to increase the likelihood of discovering therapies for such non-responding patients. Presently, the marketing of novel medicines requires extensive clinical trials conducted to demonstrate the efficacy and safety of the candidate medicine. In any given clinical trial, there will be an observed percentage of the patients enrolled in that trial who will either respond to the candidate medicine as hoped for, or who will respond less strongly, or who will not respond at all. Also, there are three possible adverse side effect outcomes, namely no adverse side effect, some acceptable degree of adverse side effect, and an unacceptable adverse side effect. Currently available data suggest that a major part of the partial responders or non-responders populations results from multiple etiologies leading to the recognized phenotype. Single nucleotide polymorphism (SNP) profiling of different medicine-responsive association groups during such clinical studies implies that the location of genes contributing to heterogeneous forms of the disease can also be identified, leading to the discovery of additional susceptibility targets.

[0013] A systematic study of those populations of patients who respond to a given medicine is complemented by a study of the converse, that is, a systematic study of those subgroups of patients who did not respond with efficacy and acceptable safety outcomes to the initially studied medicine. Such partial responders or non-responders could be identified in real time, rather than by the current trial and error system that performs this function once a medicine appears in the marketplace. Currently drugs are broadly marketed to many patients who will not benefit and who may experience adverse reactions. Little information of use is obtained from these patients currently, other than broad warnings for use in product labeling.

[0014] There is thus a need in the art for a method of designing human clinical drug trials in a fashion that benefits available patient populations through 1) minimizing the likelihood of adverse events, 2) maximizing the likelihood of therapeutic response and 3) providing a pool of data that readily suggests a subsequent clinical trial that is capable of utilizing all prior data, whether for responders or for non-responder. The present invention therefore additionally includes a method of conducting clinical drug trials by pharmacogenetic stratification of a patient population, comprising the steps of conducting a first clinical drug trial on a patient population, such that said drug trial identifies an association between a phenotype (response or non-response to a leukotriene antagonist) and a genotype; separating said patient population in said clinical drug trial into sub-populations of responders and non-responders; conducting a subsequent clinical drug trial on a non-responder patient population such that said subsequent drug trial identifies a subsequent association between a phenotype and a genotype; separating the patient population of step (c) into subsequent responder and subsequent non-responder patient populations; and then repeating steps (c) and (d) through as many iterations as desired.

BRIEF DESCRIPTION OF THE FIGURES

[0015]FIG. 1 is a graph showing the results of a previous study of the correlation between Sp1 polymorphisms at the ALOX5 gene alone and diminished response to the leukotriene synthesis inhibitor compound ABT-761 (Abbott Laboratories Inc., North Chicago, Ill.). The study was a randomized double-blind parallel-group trial (n=221) of clinically stable asthma patients, with FEV₁ of 40%-75% of predicted. ABT-761 was given at 150 and 300 mg/day. The vertical axis graphs the percent change in baseline FEV₁ after drug treatment; the horizontal axis provides genotypes (5,5=homozygous wild-type; 5,X=heterozygous wild-type; XX=two non-wildtype alleles). Approximately 6% of the subjects were without the wild-type allele. The change in the variant group was significantly different from the 5,5 group (*p<0.000l).

[0016]FIG. 2 is a graph showing the correlation between Sp1 polymorphisms at the ALOX5 gene and response to the leukotriene inhibitor compound zafirlukast, also showing the relative difference in such response as compared to fluticasone propionate (FP88). The vertical axis graphs the change in baseline FEV₁ (% predicted, change from baseline) after drug treatment; the horizontal axis provides genotypes (5,5=homozygous wildtype; 5,X=heterozygous wildtype; X,X=two non-wildtype alleles); open bars represent fluticasone propionate; shaded bars represent zafirlukast. Of the subjects, 88 (59.5%) had genotype 5,5 and 44 each were treated with FP88 and zafirlukast; 50 (33.8%) were 5,X (31 treated with FP88 and 19 treated with zafirlukast); and 10 (6.8%) were X,X (5 treated with FP88 and 5 treated with zafirlukast).

[0017]FIG. 3 is a graph showing the correlation between polymorphisms at the A-444C site in the LTC4 Synthase gene and response to the leukotriene inhibitor compound zafirlukast, also showing response to fluticasone propionate (FP88). The vertical axis graphs the change in baseline FEV₁ (% predicted, change from baseline) after drug treatment; the horizontal axis provides genotypes (A/A=homozygous wildtype; A/C=heterozygous wildtype; C/C=homozygous for adenine to cytosine transversion polymorphism); open bars represent fluticasone propionate; shaded bars represent zafirlukast. Asterisks indicate a significant difference (p≦0.05) between FP88 and zafirlukast results within a genotype. Of the subjects, 82 (57.8%) were A,A (48 treated with FP88, 34 treated with zafirlukast), 50 (35.2%) were A,C (20 treated with FP88, 30 treated with zafirlukast), 10 (7%) were C,C (6 treated with FP88, 4 treated with zafirlukast).

[0018]FIG. 4 is a graph showing the correlation between A1728G polymorphisms in the ALOX5 gene and response to fluticasone proprionate (FP88) and zafirlukast. The vertical axis represents the change in baseline FE₁ (% predicted, change from baseline) after drug treatment; the horizontal axis provides genotypes (A/A=homozygous wildtype; A/G=heterozygous wildtype; G/G=homozygous for adenine to guanine transversion polymorphism); open bars represent fluticasone propionate; shaded bars represent zafirlukast. Of the subjects, 130 were A,A (72 treated with FP88, 58 treated with zafirlukast), 18 were A,G (8 treated with FP88, 10 treated with zafirlukast), and 1 was G,G (treated with zafirlukast).

DETAILED DESCRIPTION OF THE INVENTION

[0019] The present inventors have determined that polymorphic variations in the ALOX5 gene and/or the LTC4S gene can be correlated to the response to pharmaceutical treatment, particularly treatment with leukotriene receptor antagonists, more particularly with CysLT1 leukotriene receptor antagonists, and also particularly with glucocorticoids. The present inventors have identified that there exists a single nucleotide polymorphism in the promoter region of enzyme LTC4 Synthase; an adenine to cytosine transversion 444 nucleotides upstream from the first codon, that is correlated with the response of subjects with asthma to treatment with a leukotriene receptor antagonist. They have further identified polymorphisms in the ALOX5 gene which are correlated with patient response. One such ALOX5 polymorphism is in the promoter region and contains 3 to 6 tandem repeats of the Sp-1 binding motif GGGCGG; individuals homozygous for the most commonly occurring allele (five tandem Sp1-binding motifs) are wild type, and individuals having 3, 4 or 6 tandem repeats of the Sp-1 binding motif are considered variant (i.e., non-wildtype). (Other numbers of tandem repeats may be found to be variant). Additional ALOX5 polymorphisms investigated include a G to A transversion polymorphism 1708 bases upstream from the first codon of the ALOX5 gene (G-1708A), and a single base transversion polymorphism 1728 bases downstream from the first codon (in exon 13) of the ALOX5 gene (A1728G or Pro576Pro). ALOX5 polymorphisms have also been found to be correlated with the response of subjects with asthma to treatment with a leukotriene receptor antagonist.

[0020] Little is known about the functionality of the LTC4 synthase promoter polymorphism, although an association with this allele and aspirin intolerant asthma has been published (Sanak, M et al Leukotriene C4 synthase promoter polymorphism and risk of aspirin-induced asthma. The Lancet 350;1599-1600, 1997). Applicants found a frequency of 57.6% homozygous wild type, 34.7% heterozygous, and 7.6% homozygous variant for this LTC4 synthase promoter polymorphism. These frequencies are similar to those found with the ALOX5 promoter polymorphism, yet the genes for these enzymes reside on different chromosomes.

[0021] As used herein, a “respiratory disorder that is potentially treatable” with a particular compound is one in which such treatment has been shown to be beneficial in a significant number of subjects suffering from that respiratory disorder. As will be apparent to those skilled in the art, a condition that is treatable with a certain compound or class of compounds does not imply that every patient so treated will benefit.

[0022] Polymorphisms may be present in the coding sequence of a gene, or in the 5′ or 3′ noncoding regions. The 5′ noncoding region includes sequences important in transcriptional regulation, including promoters, negative regulatory regions, and positive regulatory regions.

[0023] Genetic samples were obtained from subjects enrolled in clinical trials for the treatment of asthma. The genetic samples were first screened for an adenine to cytosine transversion polymorphism 444 nucleotides upstream from the first codon in the leukotriene C4 Synthase gene (LTC4S gene), using polymerase chain reaction (PCR) technology. The alleles were labeled as “A” (adenine) or “C” (cytosine) resulting in three possible genotypes (A/A, A/C, and C/C

[0024] The nucleotide sequence of human leukotriene C4 synthase (LTC4S) is provided in GenBank at accession number U50136 (SEQ ID NO:1): 1 gagctcacag agcccccagc tggggcatat ctggtttccg ggggcagggg cgatacccag 61 aggaggaaga agggattctg agagagccca acaggctccg agcctcaggc tggagctgag 121 cttggggcag caaggaagga ccaggtgcga gggcagaacc atgcggcccg acccctgcag 181 cacggcctgt ggcctccccc agctcctgcc cgtgcttctg ggtcagtctg gactttgcca 241 cttctgacca aaagccaccg caaacccact caagccaaaa gaggaagtga ccgttaggcc 301 caactgggaa ggctggcggc caggggcact ccaggcaggg cgaggggggc ggccgggggc 361 gctccaggcg gggcgaggga gacacccaga actccaggca ggagtcctcg ggtgccacct 421 ttcctctcca cctggccctg cgtgggctct gtcctcaggg tggcccgccg tagtccccct 481 ccccactctg agtttcctgt cccaaagtcc taaggaagtt tccagaacta catctcacca 541 tcttgagtca gccttggctc agtgtccatc tcacaggcct ggaaggggca ggagtcagca 601 ctgtccagac cacagggcct gagtgtgggg agggcagccg tctaggaagg tggtggaggg 661 ttgttacctt gaggcaagag ggctgcgggg cagaaagaca cagcaggtga ctgttgtggg 721 aggcccaaga gaggcctggg agagggatgg cccacaaggg ctgaccctcc cgccacccag 781 ggggccttgg acaggtttcc tcctggcagg gtggcccttg tgcatggaac ccctacaacg 841 actaaggctg gcaggcatga ggtttcctga aggagaaaga gcttgtgggg cccagtgtgg 901 ctgggggggc gctgggactc cattctgaag ccaaaggcac tgggaagggc ttccgcagag 961 gagggtttgg caggggttgc caggaacagc ctggatgggg acagggaaca gataaggtgg 1021 gtggaggagt tagccgggag cctggggctg gctccagcat gatgtggggg tctgcaaggc 1081 cctggagaaa gtggggtggt gcagcagggg gcacacccac agctggagct gacccagatg 1141 gacagcttgg gctctgccac gcgggactag gcaaggaagg ggcacgaaca agcaggaagt 1201 ggtgaggcgg tctccagcta gctgctctcc cctgcccaga ctttggtttc ctccctgctg 1261 gcttggcctg gctccctggc tctgtgtggt atggtcacac ccccgtgcac cccctccact 1321 gagatggggc ggggagagca ccgaggctgc tcttcctctc ctgggccgtc ctctgagcag 1381 cagacggggc taagcgttcc ccagctcgcc ttcacacaca gcccgtgcca ccacaccgac 1441 ggtaccatga aggacgaggt agctctactg gctgctgtca ccctcctggg agtcctgctg 1501 caaggtgggc tggttcctat ctaggaagag ggtgggcctt agatccctac agcttgccct 1561 ctgcccccta ggcccaggtg gagggcagag gtggggactc cagcccaggc ccaagctgga 1621 agagggtggg gactttcagg gaactggggg gcacctggct gtgagagctg taggacttgg 1681 gggtggcaag ggtgccagga caaatggtag gatagccatg ggcttgggga agctgatctc 1741 tgctctttcc agctgtcccc tctctgggcg tcccagcaag cggcccccat tccctggctc 1801 tgcttcaaag gcacctccat actgggacca cgtggagcag ggtagaggtg ggactccttc 1861 ctccagcccc ctaaaaagag cctgcttaat gcctttctca gactggccct aaaggacaca 1921 ttccttggcc agatatcctt gccacctaag agacaccact actccacagt gtgtgggcta 1981 ggataaggca cagcctgggg agggggctct gaaggggctg aacagacagg ccagcctgac 2041 ctccagctgc tcctgcactg agctggatgg ccaccctgtg acacccatct gcagagggcc 2101 cagaaccaaa ggtgccaggg ctgcaggact cagggggaga tggtccgacg ggaggtctgg 2161 ggagggagcg cacagccagc actggtctgt gtgtggtctg gcctggcctc acctgaccaa 2221 gagaagggct cctgcccaca gagaaacttt agggccagcc caccctctgc aactacccca 2281 gccctggggt cctggggtta ggctaggaga gtcccagctg caacctcctg ggagcaggag 2341 agaaggtgtc tgtcagattt aggcctggga ccggaatgca ggaacagaga aactgaggtt 2401 tggaggcaca gggacgcagg ctttagtgat cccggcctga ggcagggtca gagggccctg 2461 ctggtgggcg ctggtaggtg ggtgaccagg gactgttagc tacagggagt gtgcttcctt 2521 gcacctggga ggatgcagcc agctctgccc tcagactccc gaggcacttc ctggccaggg 2581 acctgaaagc tgcatttgcc tgtgttttga gagtgaaatg attcagaaac aaggactcaa 2641 gtggtctctc tcgcggagca ggtgtccctg tgcctgaatc actcaccctc ccccatacac 2701 tcacaggttg ggacagggcc tctctgcgcc ccaggcttca gccctgccct cctcgctgaa 2761 tgtcagggac acagggcagg ccagggatgg gtgagacgag aggtctcctc gggcggggag 2821 ggggcggggt tccgccttag ggaggagagg acacggccaa gtgaagggcc agattgcagg 2881 atccctccca ctcccatctc tggggcttcg ggtgtccaga cctgactccc gctccccctc 2941 ctcccccagc ctacttctcc ctgcaggtga tctcggcgcg cagggccttc cgcgtgtcgc 3001 cgccgctcac caccggccca cccgagttcg agcgcgtcta ccgagcccag tgaggcgcgg 3061 cgggagggcg cggggcgggg agcgagcccc aggcgggtcc gggtcgcagg accatcccgg 3121 ccggcgcgct catcccaccc gcccaccgca gggtgaactg cagcgagtac ttcccgctgt 3181 tcctcgccac gctctgggtc gccggcatct tctttcatga aggtcggggt gtggggcagg 3241 ggcgcacgcg ctggaccccc gggacccgcg cagggcgctc accaggcccg tgcgtacctc 3301 tcgcaggggc ggcggccctg tgcggcctgg tctacctgtt cgcgcgcctc cgctacttcc 3361 agggctacgc gcgctccgcg cagctcaggt gagggccggg cggggagcgg ggcggggccg 3421 gggaaagatc gcgggcgggc ggggctcctg gggagcggga ccgaagctgg gggcgggcga 3481 cgggccggag cccagcgcct ttggggattc ggtgggcgag ccctggcggc ggccagagga 3541 agtccccgtg gggccagggt tgcggcgggg aagaagcggg cctcctcgcg ccacctcccc 3601 gctgaccgcc gcccgcaggc tggcaccgct gtacgcgagc gcgcgcgccc tctggctgct 3661 ggtggcgctg gctgcgctcg gcctgctcgc ccacttcctc ccggccgcgc tgcgcgccgc 3721 gctcctcgga cggctccgga cgctgctgcc gtgggcctga gaccaaggcc cccgggccga 3781 cggagccggg aaagaagagc cggagcctcc agctgccccg gggaggggcg ctcgcttccg 3841 catcctagtc tctatcatta aagttctagt gaccgagacc cgggctgcgt tctctgggtc 3901 cgcgggggtg gcgcaccgcg ggctacggag cctggagggg cccagcccga gtccgggcag 3961 cccggggcgg gcttcctagt ggcggcgtga gagtggctgc gaaggaacga gccctccccc 4021 tggggcggga ctggatccgg tcttcacctc ctaccccact ccctactcag cctcggggtc 4081 acaaggccgc ccagtcctgc cggggttcac cctcctagcg ctcagcggtc tcctcaccgg 4141 tccccctcct caggggcctt ccctcgactc tcagccgccg cagtccctcg tcccctggcc 4201 ttcacagctg acactagata gagcctgtgg ctctctcccc aggtgagggc aggggttttt 4261 cttttggtca gcactggatc cccctcgtta actgtaggtg ttcagggcag ccctccgagg 4321 tccgcagagc tgcgggcacc atgggaacga agtgagtcag tgacaggcgg tctcaaggaa 4381 atgtccagaa gccttgggga tccaggggag gcccacagaa acaaagaagt gacttttagc 4441 caagtatgca ggagaaacgg aggag

[0025] The protein encoded by the above is provided at SEQ ID NO:2.

[0026] An adenine to cytosine transversion polymorphism (A-444C) is known at the position 444 nucleotides upstream (bold and underlined, above) from the first codon (underlined, above). Accordingly, the “A” allele as defined herein would comprise the sequence CTGGATGGGG ACAGGGAACA (SEQ ID NO:3) (nucleotides 991-1010 of SEQ ID NO:1). In contrast, the “C” allele as defined herein would comprise the sequence CTGGATGGGG ACCGGGAACA (SEQ ID NO:4) (nucleotides corresponding to 991-1010 of SEQ ID NO:1).

[0027] The genetic samples were secondly screened for a polymorphism in the region of 176 to 147 base pairs upstream from the ATG start site in 5-lipoxygenase (ALOX5), whereby the presence of 5 tandem repeats of the Sp1 binding motif (GGGCGG; SEQ ID NO:12) is wildtype, and the presence of 3, 4 or 6 such tandem repeats is variant, again using PCR technology. The alleles were labeled as “5” (5 tandem repeats) or “X” (3, 4 or 6 tandem repeats), resulting in three possible genotypes (5,5, 5/X and X/X). Variant ALOX5 alleles have a number of tandem repeats of the Sp1 binding motif in this region that is more than, or fewer than, five repeats. That is, in the region of from about 200 nucleotides to about 125 nucleotides upstream of the ATG start site in ALOX5, there are from one to four, or more than five, repeats of the Sp1 binding motif. In the present studies, variant ALOX5 alleles (“X”) had three, four or six tandem repeats in this area.

[0028] Screening was also conducted for a G to A transversion polymorphism 1708 bases upstream from the first codon of the ALOX5 gene (G-1708A), and for a single base transversion polymorphism 1728 bases downstream from the first codon (in exon 13) of the ALOX5 gene (A1728G).

[0029] The nucleotide sequence of the 5′ region and partial coding sequence of human 5-lipoxygenase (ALOX5) containing five repeats of the Sp1 binding motif, and the G-1708A polymorphism, is provided at GenBank Accession number M38191 (SEQ ID NO:5) 1 ggatccagaa taaccaaaac aatattgaaa aataaagaac agcgttggtg gattaacatt 61 ttccaatttc aaaacttact atagcactgc ggtaatcaag cagtgtggca ctgtatagca 121 tgtacattac agatcagtgg actagaatca atgtccagaa ataaaccgtt atgtttataa 181 tgaattactt tttaataagg tgtcaagaca acgcaatggg aaaagaataa tgaattcaac 241 aaatgatgca tggacaaccg gacatgcaca tgcaacacaa tgaatttgaa ttcttctatc 301 gctccatgca taaaaactaa ctcaaaatgg gtcacggatg taaatgaaaa gctaaaacta 361 taataatcct agaggaaaac ctaggagtaa atctttaaga tgttattgta ggcagtggtt 421 tctcagatag gaccccaaaa tcacaagcga caaaaagaaa ttggacttaa agttaaatac 481 ttttgtgctt caaacatcat caagaaagtg aaaacacaac ccgcagaagc aataaaaatg 541 tctgtaagtc atgtatccga ttagagactt ctatccagga tatataaata atgcaattca 601 atgataaaaa agataaatag cccagttttc caaagagtca agcatctgaa tatacatctc 661 tccaaaaata tacagatatc caacaagcat gtgaaaagat gttcaaagcc atttgccagg 721 tgcacaaacc caagacagta tgaggagatg ctacagggac tctgctgctt cacagacatg 781 aagcgttggt gagaatgtag gcagccgcct ttggggactt cacatccccg ccgccccacg 841 cacggtgagc tagtgtttaa acttagccga gatcaataca cgcgactgtg tgcccgtcag 901 accctgcgct gccggcgggg ctgggagagg cgggcgccag gagtgggcgg gaacctgggg 961 gtcaggcccc agccgcggga agcgcgccca ggagcgcgcg aaaccttctc cacacccttc 1021 caggcatttg cccgccgcga ttcagagagc cgacccgtga cccctggcct cccctagaca 1081 gccccgcatg tccagatgtg ccgtcccgcc tgcctcccgc gaccactggc catctctggg 1141 cctgggcgcg gttctcggcg cccggcctgc ccccgccagg agccgcaggt ccagccagtg 1201 aagaagcccg cgcctgaagg agcctctgtg ctccagaatc catcctcagt atcagcgctg 1261 gggtggcctc ctccaggaag cccttctgat tctctcatgg gtcgctcttc ctctgcagac 1321 tcccggagca ccccctgctc caagtaccgc aagtggcact gagaacttgg ggagagcaga 1381 ggctgtgcct agatttgtag ggagtccccg cagctccacc ccagggccta caggagcctg 1441 gccttgggcg aagccgaggc aggcaggcag ggcaaagggt ggaagcaatt caggagagaa 1501 cgagtgaacg aatggatgag gggtggcagc cgaggttgcc ccagtcccct ggctgcagga 1561 acagacacct cgctgaggag agacccagga gcgaggcccc tgccccgccc gaggcgaggt 1621 cccgcccagt cggcgccgcg cgtgaagagt gggagagaag tactgcgggg gcgggggcgg 1681 gggcgggggc gggggcgggg gcagccggga gcctggagcc agaccggggc ggggccggga 1741 ccggggccag ggaccagtgg tgggaggagg ctgcggcgct agatgcggac acctggaccg 1801 ccgcgccgag gctcccggcg ctcgctgctc ccgcggcccg cgccatgccc tcctacacgg 1861 tcaccgtggc cactggcagc cagtggttcg ccggcactga cgactacatc tacctcagcc 1921 tcgtgggctc ggcgggctgc agcgagaagc acctgctgga caagcccttc tacaacgact 1981 tcgagcgtgg cgcggtgagc gcgggcgggg cacgggtgga gcgcgggctg aggtgcgtcc 2041 gggacccggt ttggacggca gaggcctggg cgggggcgcc gagggcccgt cggggcggcc 2101 cggacaggac tgggggtgtc caggaccctg tcagggaggg cagaactgcg gtggggcgtg 2161 ccctgggctc ccagtggccg gtgggtacc

[0030] The first codon is underlined; the region comprising the repeats of the Sp1 binding motif (GGGCGG) is shown in bold and underlined type; the G-1708A position is also shown in bold and underlined type.

[0031] The 5-lipoxygenase gene has been cloned as cDNA (Matsumoto et al., Proc. Natl. Acad. Sci. USA 85:3406 (1988) and as a genomic clone (Hoshiko et al., Proc. Natl. Acad. Sci. USA 87:9073 (1990). The 5-lipoxygenase gene is approximatly 85 kilobases in size, with 14 exons and 15 introns.

[0032] Two ALOX5 mRNA sequences are provided in GenBank at Accession numbers NM 000698 and XM 005818. The sequence provided at NM 000698 encodes a protein of 674 amino acids and is shown below: (SEQ ID NO:13) 1 gggcgccgag gctccccgcc gctcgctgct ccccggcccg cgccatgccc tcctacacgg 61 tcaccgtggc cactggcagc cagtggttcg ccggcactga cgactacatc tacctcagcc 121 tcgtgggctc ggcgggctgc agcgagaagc acctgctgga caagcccttc tacaacgact 181 tcgagcgtgg cgcggtggat tcatacgacg tgactgtgga cgaggaactg ggcgagatcc 241 agctggtcag aatcgagaag cgcaagtact ggctgaatga cgactggtac ctgaagtaca 301 tcacgctgaa gacgccccac ggggactaca tcgagttccc ctgctaccgc tggatcaccg 361 gcgatgtcga ggttgtcctg agggatggac gcgcaaagtt ggcccgagat gaccaaattc 421 acattctcaa gcaacaccga cgtaaagaac tggaaacacg gcaaaaacaa tatcgatgga 481 tggagtggaa ccctggcttc cccttgagca tcgatgccaa atgccacaag gatttacccc 541 gtgatatcca gtttgatagt gaaaaaggag tggactttgt tctgaattac tccaaagcga 601 tggagaacct gttcatcaac cgcttcatgc acatgttcca gtcttcttgg aatgacttcg 661 ccgactttga gaaaatcttt gtcaagatca gcaacactat ttctgagcgg gtcatgaatc 721 actggcagga agacctgatg tttggctacc agttcctgaa tggctgcaac cctgtgttga 781 tccggcgctg cacagagctg cccgagaagc tcccggtgac cacggagatg gtagagtgca 841 gcctggagcg gcagctcagc ttggagcagg aggtccagca agggaacatt ttcatcgtgg 901 actttgagct gctggatggc atcgatgcca acaaaacaga cccctgcaca ctccagttcc 961 tggccgctcc catctgcttg ctgtataaga acctggccaa caagattgtc cccattgcca 1021 tccagctcaa ccaaatcccg ggagatgaga accctatttt cctcccttcg gatgcaaaat 1081 acgactggct tttggccaaa atctgggtgc gttccagtga cttccacgtc caccagacca 1141 tcacccacct tctgcgaaca catctggtgt ctgaggtttt tggcattgca atgtaccgcc 1201 agctgcctgc tgtgcacccc attttcaagc tgctggtggc acacgtgaga ttcaccattg 1261 caatcaacac caaggcccgt gagcagctca tctgcgagtg tggcctcttt gacaaggcca 1321 acgccacagg gggcggtggg cacgtgcaga tggtgcagag ggccatgaag gacctgacct 1381 atgcctccct gtgctttccc gaggccatca aggcccgggg catggagagc aaagaagaca 1441 tcccctacta cttctaccgg gacgacgggc tcctggtgtg ggaagccatc aggacgttca 1501 cggccgaggt ggtagacatc tactacgagg gcgaccaggt ggtggaggag gacccggagc 1561 tgcaggactt cgtgaacgat gtctacgtgt acggcatgcg gggccgcaag tcctcaggct 1621 tccccaagtc ggtcaagagc cgggagcagc tgtcggagta cctgaccgtg gtgatcttca 1681 ccgcctccgc ccagcacgcc gcggtcaact tcggccagta cgactggtgc tcctggatcc 1741 ccaatgcgcc cccaaccatg cgagccccgc caccgactgc caagggcgtg gtgaccattg 1801 agcagatcgt ggacacgctg cccgaccgcg gccgctcctg ctggcatctg ggtgcagtgt 1861 gggcgctgag ccagttccag gaaaacgagc tgttcctggg catgtaccca gaagagcatt 1921 ttatcgagaa gcctgtgaag gaagccatgg cccgattccg caagaacctc gaggccattg 1981 tcagcgtgat tgctgagcgc aacaagaaga agcagctgcc atattactac ttgtccccag 2041 accggattcc gaacagtgtg gccatctgag cacactgcca gtctcactgt gggaaggcca 2101 gctgccccag ccagatggac tccagcctgc ctggcaggct gtctggccag gcctcttggc 2161 agtcacatct cttcctccga ggccagtacc tttccattta ttctttgatc ttcagggaac 2221 tgcatagatt gtatcaaagt gtaaacacca tagggaccca ttctacacag agcaggactg 2281 cacaggcgtc ctgtccacac ccagctcagc atttccacac caagcagcaa cagcaaatca 2341 cgaccactga tagatgtcta ttcttgttgg agacatggga tgattatttt ctgttctatt 2401 tgtgcttagt ccaattcctt gcacatagta ggtacccaat tcaattacta ttgaatgaat 2461 taagaattgg ttgccataaa aataaatcag ttcattt

[0033] The 1728 polymorphism site is indicated in underlined and bolded type; the A1728G polymorphism does not change the encoded amino acid (proline at amino acid position 576; SEQ ID NO: 14).

[0034] The sequence at XM 005818 is provided below (SEQ ID NO: 15) and encodes an amino acid sequence (SEQ ID NO: 16) that differs from that encoded by NM000698 in the initial amino acids. The site of the A1728G polymorphism (numbering referenced to NM000698) is shown in underlined bold type. (SEQ ID NO:15) 1 cttcaccccg tggtgaagac actgacgact acatctacct cagcctcgtg ggctcggcgg 61 gctgcagcga gaagcacctg ctggacaagc ccttctacaa cgacttcgag cgtggcgcgg 121 tggattcata cgacgtgact gtggacgagg aactgggcga gatccagctg gtcagaatcg 181 agaagcgcaa gtactggctg aatgacgact ggtacctgaa gtacatcacg ctgaagacgc 241 cccacgggga ctacatcgag ttcccctgct accgctggat caccggcgat gtcgaggttg 301 tcctgaggga tggacgcgca aagttggccc gagatgacca aattcacatt ctcaagcaac 361 accgacgtaa agaactggaa acacggcaaa aacaatatcg atggatggag tggaaccctg 421 gcttcccctt gagcatcgat gccaaatgcc acaaggattt accccgtgat atccagtttg 481 atagtgaaaa aggagtggac tttgttctga attactccaa agcgatggag aacctgttca 541 tcaaccgctt catgcacatg ttccagtctt cttggaatga cttcgccgac tttgagaaaa 601 tctttgtcaa gatcagcaac actatttctg agcgggtcat gaatcactgg caggaagacc 661 tgatgtttgg ctaccagttc ctgaatggct gcaaccctgt gttgatccgg cgctgcacag 721 agctgcccga gaagctcccg gtgaccacgg agatggtaga gtgcagcctg gagcggcagc 781 tcagcttgga gcaggaggtc cagcaaggga acattttcat cgtggacttt gagctgctgg 841 atggcatcga tgccaacaaa acagacccct gcacactcca gttcctggcc gctcccatct 901 gcttgctgta taagaacctg gccaacaaga ttgtccccat tgccatccag ctcaaccaaa 961 tcccgggaga tgagaaccct attttcctcc cttcggatgc aaaatacgac tggcttttgg 1021 ccaaaatctg ggtgcgttcc agtgacttcc acgtccacca gaccatcacc caccttctgc 1081 gaacacatct ggtgtctgag gtttttggca ttgcaatgta ccgccagctg cctgctgtgc 1141 accccatttt caagctgctg gtggcacacg tgagattcac cattgcaatc aacaccaagg 1201 cccgtgagca gctcatctgc gagtgtggcc tctttgacaa ggccaacgcc acagggggcg 1261 gtgggcacgt gcagatggtg cagagggcca tgaaggacct gacctatgcc tccctgtgct 1321 ttcccgaggc catcaaggcc cggggcatgg agagcaaaga agacatcccc tactacttct 1381 accgggacga cgggctcctg gtgtgggaag ccatcaggac gttcacggcc gaggtggtag 1441 acatctacta cgagggcgac caggtggtgg aggaggaccc ggagctgcag gacttcgtga 1501 acgatgtcta cgtgtacggc atgcggggcc gcaagtcctc aggcttcccc aagtcggtca 1561 agagccggga gcagctgtcg gagtacctga ccgtggtgat cttcaccgcc tccgcccagc 1621 acgccgcggt caacttcggc cagtacgact ggtgctcctg gatccccaat gcgcccccaa 1681 ccatgcgagc cccgccaccg actgccaagg gcgtggtgac cattgagcag atcgtggaca 1741 cgctgcccga ccgcggccgc tcctgctggc atctgggtgc agtgtgggcg ctgagccagt 1801 tccaggaaaa cgagctgttc ctgggcatgt acccagaaga gcattttatc gagaagcctg 1861 tgaaggaagc catggcccga ttccgcaaga acctcgaggc cattgtcagc gtgattgctg 1921 agcgcaacaa gaagaagcag ctgccatatt actacttgtc cccagaccgg attccgaaca 1981 gtgtggccat ctgagcacac tgccagtctc actgtgggaa ggccagctgc cccagccaga 2041 tggactccag cctgcctggc aggctgtctg gccaggcctc ttggcagtca catctcttcc 2101 tccgaggcca gtacctttcc atttattctt tgatcttcag ggaactgcat agattgatca 2161 aagtgtaaac accataggga cccattctac acagagcagg actgcacagc gtcctgtcca 2221 cacccagctc agcatttcca caccaagcag caacagcaaa tcacgaccac tgatagatgt 2281 ctattcttgt tggagacatg ggatgattat tttctgttct atttgtgctt agtccaattc 2341 cttgcacata gtaggtaccc aattcaatta ctattgaatg aattaagaat tggttgccat 2401 aaaaataaat cagttcattt

[0035] The present inventors have determined that the C/C genotype at the A-444C site of LTC4S, the X/X Sp1genotype in ALOX5, and the polymorphism at the A1728G site of ALOX5 are independently associated with diminished response to the Cys LT1 leukotriene receptor antagonist zafirlukast.

[0036] According to the present methods, a subject who suffers from asthma that is potentially treatable with an anti-inflammatory inhaled glucocorticoid or a leukotriene antagonist, is genetically screened, to aid in predicting their response to such treatment. Screening comprises obtaining a sample of DNA from the subject and screening the DNA to determine the genotype (presence/absence of polymorphic alleles) at a predetermined polymorphic site in the gene of interest (here ALOX5 and/or LTC4S polymorphisms as described), where different genotypes at that site have previously been associated with different incidences of a phenotypic response to treatment. The presence of a particular genotype therefore indicates an increased likelihood that the individual subject will exhibit the associated phenotype. The genotype will rarely be absolutely predictive, i.e., where a population with a certain genotype displays a high incidence of a particular phenotype, not every individual with that genotype will display the phenotype. However, it will be apparent to those skilled in the art that genotyping a subject as described herein will be an aid in predicting the response a subject will have to treatment with a leukotriene receptor antagonist or a glucocorticoid, and thus assist in the treatment decision.

[0037] As used herein, “genotyping a subject (or DNA sample) for a polymorphic allele at a defined genomic locus” or “determining the genotype at a polymorphic allelic site” means detecting which forms of the allele are present in a subject (or a biological sample). As is well known in the art, an individual may be heterozygous or homozygous for a particular allele. More than two forms of an allele may exist, as is the case with microsatellite markers; thus there may be more than three possible genotypes.

[0038] As used herein, a subject that is “predisposed to” a particular phenotypic response based on genotyping of a polymorphic allele will be more likely to display that phenotype than an individual with a different genotype at that polymorphic allele. Where the phenotypic response is based on a biallelic polymorphism, the response may differ among the three possible genotypes (Eg. For LTC4S: A,A; A,C and C,C).

[0039] As used herein, a “genetic subset” of a population consists of those members of the population having a particular genotype. In the case of a biallelic polymorphism, a population can potentially be divided into three subsets: homozygous for allele 1, heterozygous, and homozygous for allele 2. Where multiple non-wildtype polymorphisms exist, a population can also be divided into three subsets: homozygous wildtype; heterozygous wildtype; and homozygous non-wildtype.

[0040] As used herein, asthma treatable with an anti-inflammatory glucocorticoid or treatable with a leukotriene receptor antagonist is a disease in which the administration of such a drug (in an appropriate pharmaceutical formulation, and in a therapeutically effective amount) has been shown to reduce or alleviate symptoms, without causing unacceptable side effects. Such therapeutic effectiveness is typically evidenced by Regulatory Authority (eg FDA, EMEA) approval of the pharmaceutical preparation, or by publication of the results of clinical studies in peer-reviewed medical journals. Therapeutically effective amounts of such compounds can be readily determined by those skilled in the art using, e.g., dose-response studies.

[0041] Known leukotriene receptor antagonists include zafirlukast, montelukast, pranlukast or iralukast.

[0042] As used herein, a “side effect” is an undesirable response to the administration of a therapeutic compound, e.g., an effect that is not directed to alleviating the symptoms or cause of the disease being treated. Side effects range from minor inconveniences to more serious events.

[0043] As used herein, “response” to treatment with a therapeutic compound is a desirable response to the administration of the compound, e.g., alleviation of the symptoms of the disease or of the underlying pathologic causes of the symptoms. Various indicators of a subject's response to therapeutic treatment may be assessed, as will be apparent to one skilled in the art. As an example, the change in Forced Expiratory Volume (FEV; FEV₁=FEV for 1 second duration) may be used as an indicator of response to treatment for asthma, as will be apparent to one skilled in the art.

[0044] According to the present methods, a compound with leukotriene receptor antagonism may be screened for variation in its effects among genetic subpopulations of subjects with asthma. Such methods involve administering the compound alone, or in tandem with another anti-asthma compound (such as a glucocorticoid), to a population of subjects suffering from asthma, obtaining DNA samples from the subjects (which may be done either prior to or after administration of the compounds), genotyping a polymorphic allelic site in the gene of interest, and correlating the genotype of the subjects with their phenotypic responses (both favorable and unfavorable) to the treatment. A genotype that is correlated with an increased incidence of a desired therapeutic response, compared to the incidence in subjects with alternative genotypes at the polymorphic allelic site, indicates that the effectiveness of the compound in treating asthma varies among genetic subpopulations.

[0045] Stated another way, the methods of the present invention may be used to determine the correlation of a known polymorphic allele with the response of subjects to treatment with a leukotriene receptor antagonist or a glucocorticoid. The population of subjects with the disease of interest is stratified according to genotype for the particular polymorphic allele, and their response to a therapeutic agent is assessed (either prospectively or retrospectively) and compared among the genotypes. The response to the therapeutic agent may include either, or both, desired therapeutic responses (e.g., the alleviation of signs or symptoms) and undesirable side effects. In this way, genotypes that are associated with an increased (or decreased) incidence of therapeutic efficacy, or an increased (or decreased) incidence of a particular side effect, may be identified. The increase or decrease in response is in comparison to the other genotypes, or to a population as a whole.

[0046] Polymorphisms are variant sequences within the human genome that may or may not have a functional consequence. These variants can be used in all aspects of genetic investigation including the analysis and diagnosis of genetic disease, forensics, evolutionary and population studies. Two types of genetic analyses are typically performed: linkage and association studies.

[0047] A linkage study provides genetic map information with no prior knowledge or assumption about the function of a gene. In a linkage study one uses DNA polymorphisms to identify chromosomal regions that are identical between affected relatives with the expectation that allele sharing frequencies will be higher for a marker (polymorphism) whose chromosomal location is close to that of the disease allele. Physical cloning of a linkage region narrows down the DNA sequence that could harbor the candidate disease gene. While linkage analysis locates the disease locus to a specific chromosome or chromosome region, the region of DNA in which to search for the gene is typically large, on the order of several million base pairs.

[0048] In contrast to linkage, association shows the coexistence of a polymorphism and a disease phenotype in a population. Association studies are based upon linkage disequilibrium, a phenomenon that occurs between a marker and a disease loci when the occurrence of two alleles at different loci is larger than the product of the allelic frequencies. Since the marker and disease causing variant are in close proximity, it requires many generations of recombination to separate them in a population. Thus they tend to co-exist together on the same chromosome at a higher than expected frequency. A marker (polymorphism) is said to be associated with a specific phenotype when its frequency is significantly higher among one phenotype group compared to its frequency in another. In general, the closer a marker is to the functionally polymorphic site, the stronger the association.

[0049] Association studies offer the opportunity to finely map linkage regions, map loci refractory to linkage analysis and map unknown predisposition loci. Polymorphisms that are in linkage disequilibrium with each other can be spaced over large regions. Linkage disequilibrium has been reported in regions as small as 1 kb or as large as 500 kb. Polymorphisms throughout a gene can be in linkage disequilibrium with each other, such that it is valuable to study the whole genome structure—introns, exons, promoters and transcriptional regulatory regions, and 3′ and 5′ untranslated regions. A marker that is in linkage disequilibrium with a functional polymorphism can be tested for correlation with a phenotype.

[0050] As used herein, the term polymorphism includes Single Nucleotide Polymorphisms (SNPs), insertion/deletion polymorphisms; transversion polymorphisms; microsatellite polymorphisms; and variable number of tandem repeat (VNTR) polymorphisms.

[0051] Polymorphic alleles are typically detected by directly determining the presence of the polymorphic sequence in a polynucleotide or protein from the subject, using any suitable technique as is known in the art. Such a polynucleotide is typically genomic DNA, or a polynucleotide derived from this polynucleotide, such as in a library made using genomic material from the individual (e.g. a cDNA library). The processing of the polynucleotide or protein before the carrying out of the method of the invention is further discussed below. Typically the presence of the polymorphism is determined in a method that comprises contacting a polynucleotide or protein of the individual with a specific binding agent for the polymorphism and determining whether the agent binds to the polynucleotide or protein, where the binding indicates that the polymorphism is present. The binding agent may also bind to flanking nucleotides and amino acids on one or both sides of the polymorphism, for example at least 2, 5, 10, 15 or more flanking nucleotide or amino acids in total or on each side. In one embodiment the agent is able to bind the corresponding wild-type sequence by binding the nucleotides or amino acids which flank the polymorphism position, although the manner of binding will be different than the binding of a polymorphic polynucleotide or protein, and this difference will be detectable (for example this may occur in sequence specific PCR as discussed below).

[0052] In the case where the presence of the polymorphism is being determined in a polynucleotide it may be detected in the double stranded form, but is typically detected in the single stranded form.

[0053] The binding agent may be a polynucleotide (single or double stranded) typically with a length of at least 10 nucleotides, for example at least 15, 20, 30, or more polynucleotides. The agent may be a molecule that is a structurally similar polynucleotide that comprises units (such as purines or pyrimidines) able to participate in Watson-Crick base pairing. The agent may be a protein, typically with a length of at least 10 amino acids, such as at least 20, 30, 50, 100 amino acids. The agent may be an antibody (including a fragment of such an antibody that is capable of binding the polymorphism).

[0054] A polynucleotide agent which is used in the method will generally bind to the polymorphism of interest, and the flanking sequence, in a sequence specific manner (e.g. hybridize in accordance with Watson-Crick base pairing) and thus typically has a sequence which is fully or partially complementary to the sequence of the polymorphism and flanking region.

[0055] In one embodiment of the present methods a binding agent is used as a probe. The probe may be labeled or may be capable of being labeled indirectly. The detection of the label may be used to detect the presence of the probe on (and hence bound to) the polynucleotide or protein of the individual. The binding of the probe to the polynucleotide or protein may be used to immobilize either the probe or the polynucleotide or protein (and thus to separate it from one composition or solution).

[0056] In another embodiment of the invention the polynucleotide or protein of the individual is immobilized on a solid support and then contacted with the probe. The presence of the probe immobilized to the solid support (via its binding to the polymorphism) is then detected, either directly by detecting a label on the probe or indirectly by contacting the probe with a moiety that binds the probe. In the case of detecting a polynucleotide polymorphism the solid support is generally made of nitrocellulose or nylon. In the case of a protein polymorphism the method may be based on an ELISA system.

[0057] The present methods may be based on an oligonucleotide ligation assay in which two oligonucleotide probes are used. These probes bind to adjacent areas on the polynucleotide which contains the polymorphism, allowing (after binding) the two probes to be ligated together by an appropriate ligase enzyme. However the two probes will only bind (in a manner which allows ligation) to a polynucleotide that contains the polymorphism, and therefore the detection of the ligated product may be used to determine the presence of the polymorphism.

[0058] In one embodiment the probe is used in a heteroduplex analysis based system to detect polymorphisms. In such a system when the probe is bound to a polynucleotide sequence containing the polymorphism it forms a heteroduplex at the site where the polymorphism occurs (i.e. it does not form a double strand structure). Such a heteroduplex structure can be detected by the use of an enzyme that is single or double strand specific. Typically the probe is an RNA probe and the enzyme used is RNAse H that cleaves the heteroduplex region, thus allowing the polymorphism to be detected by means of the detection of the cleavage products.

[0059] The method may be based on fluorescent chemical cleavage mismatch analysis which is described for example in PCR Methods and Applications 3:268-71 (1994) and Proc. Natl. Acad. Sci. 85:4397-4401 (1998).

[0060] In one embodiment the polynucleotide agent is able to act as a primer for a PCR reaction only if it binds a polynucleotide containing the polymorphism (i.e. a sequence—or allele-specific PCR system). Thus a PCR product will only be produced if the polymorphism is present in the polynucleotide of the individual. Thus the presence of the polymorphism may be determined by the detection of the PCR product. Preferably, the region of the primer which is complementary to the polymorphism is at or near the 3′ end the primer. In one embodiment of this system the polynucleotide the agent will bind to the wild-type sequence but will not act as a primer for a PCR reaction.

[0061] The method may be an Restriction Fragment Length Polymorphism (RFLP) based system. This can be used if the presence of the polymorphism in the polynucleotide creates or destroys a restriction site that is recognized by a restriction enzyme. Thus treatment of a polynucleotide with such a polymorphism will lead to different products being produced compared to the corresponding wild-type sequence. Thus the detection of the presence of particular restriction digest products can be used to determine the presence of the polymorphism.

[0062] The presence of the polymorphism may be determined based on the change that the presence of the polymorphism makes to the mobility of the polynucleotide or protein during gel electrophoresis. In the case of a polynucleotide single-stranded conformation polymorphism (SSCP) analysis may be used. This measures the mobility of the single stranded polynucleotide on a denaturing gel compared to the corresponding wild-type polynucleotide, the detection of a difference in mobility indicating the presence of the polymorphism. Denaturing gradient gel electrophoresis (DGGE) is a similar system where the polynucleotide is electrophoresed through a gel with a denaturing gradient, a difference in mobility compared to the corresponding wild-type polynucleotide indicating the presence of the polymorphism.

[0063] The presence of the polymorphism may be determined using a fluorescent dye and quenching agent-based PCR assay such as the Taqman PCR detection system. In brief, this assay uses an allele specific primer comprising the sequence around, and including, the polymorphism. The specific primer is labeled with a fluorescent dye at its 5′ end, a quenching agent at its 3′ end and a 3′ phosphate group preventing the addition of nucleotides to it. Normally the fluorescence of the dye is quenched by the quenching agent present in the same primer. The allele specific primer is used in conjunction with a second primer capable of hybridizing to either allele 5′ of the polymorphism.

[0064] In the assay, when the allele comprising the polymorphism is present Taq DNA polymerase adds nucleotides to the nonspecific primer until it reaches the specific primer. It then releases polynucleotides, the fluorescent dye and quenching agent from the specific primer through its endonuclease activity. The fluorescent dye is therefore no longer in proximity to the quenching agent and fluoresces. In the presence of the allele which does not comprise the polymorphism the mismatch between the specific primer and template inhibits the endonuclease activity of Taq and the fluorescent dye in not released from the quenching agent. Therefore by measuring the fluorescence emitted the presence or absence of the polymorphism can be determined.

[0065] In another method of detecting the polymorphism a polynucleotide comprising the polymorphic region is sequenced across the region which contains the polymorphism to determine the presence of the polymorphism.

[0066] Accordingly, any of the following techniques may be utilized in the present methods for genotyping, as is known in the art.

[0067] General: DNA sequencing, sequencing by hybridization;

[0068] Scanning: PTT (Protein truncation technique), SSCP (single strand conformational analysis), DGGE (denaturing gradient gel electrophoresis), TGGE (temperature gradient gel electrophoresis), Cleavase, Heteroduplex analysis, CMC (chemical mismatch cleavage), enzymatic mismatch cleavage;

[0069] Hybridization based: solid phase hybridization (dot blots, MASDA, reverse dot blots, oligonucleotide arrays (chips)); solution phase hybridization (Taqman, Molecular Beacons);

[0070] Extension based: ARMS (Amplification Refractory Mutation System), ALEX (Amplification Refractory Mutation System Linear Extension) SBCE (Single Base Chain Extension)

[0071] Incorporation based: Mini-sequencing, APEX; (Arrayed Primer Extension)

[0072] Restriction enzyme based: RFLP (restriction fragment length polymorphism)

[0073] Ligation based: OLA (Oligonucleotide Extension Assay)

[0074] Other: Invader (Third Wave Technologies).

[0075] The present invention also provides for a predictive (patient care) test or test kit. This predictive test could be a product and/or a service which aids in disease management of asthma based on pre-determined associations between genotype and phenotypic response to leukotriene receptor antagonists in treating asthma. Such a test could take two different formats:

[0076] A) a molecular test which analyses DNA or RNA for the presence of pre-determined polymorphisms. An appropriate test kit may include one or more of the following reagents or instruments: a means to detect the binding of the agent to the polymorphism, an enzyme able to act on a polynucleotide (typically a polymerase or restriction enzyme), suitable buffers for enzyme reagents, PCR primers which bind to regions flanking the polymorphism, a positive or negative control (or both), a gel clectrophoresis apparatus and a means to isolate DNA from a sample. The product may utilise one of the chip technologies as described by the current state of the art. The test kit would include printed or machine readable instructions setting forth the correlation between the presence of a specific polymorphism or genotype and the likelihood that a subject with asthma will respond favorably to therapy with a leukotriene receptor antagonist; or

[0077] B) a biochemical test which analyses materials derived from the subject's body, including proteins or metabolites, that indicate the presence of a pre-determined polymorphism. An appropriate test kit would comprise a molecule, aptamer, peptide or antibody (including an antibody fragment) that specifically binds to a predetermined polymorphic region (or a specific region flanking the polymorphism), or a binding agent as defined herein. The product may additionally comprise one or more additional reagents or instruments (as are known in the art). The test kit would also include printed or machine-readable instructions setting forth the correlation between the presence of a specific polymorphism or genotype and the likelihood that a subject with asthma will respond favorably to therapy with a leukotriene receptor antagonist.

[0078] The invention provides a method for screening a subject diagnosed with asthma potentially treatable by leukotriene receptor antagonists, to determine the likelihood they will respond in a particular way to treatment with such a drug, more particularly a CysLT1 leukotriene receptor antagonist and most particularly zafirlukast. The method comprises screening the subject for a polymorphism in the ALOX5 gene and/or the LTC4S gene that has previously been associated with a high or low incidence of a particular desirable therapeutic outcome (compared to the incidence in subjects with other genotypes). Subjects are mammalian, and preferably humans.

[0079] Treatment of a subject with a leukotriene receptor antagonist comprises administration of an effective amount of the pharmaceutical agent to a subject in need thereof. The dose of agent is determined according to methods known and accepted in the pharmaceutical arts, and can be determined by those skilled in the art. A suitable dosage range for zafirlukast are provided in the disclosure of the Physician's Desk Reference, the entire disclosure of which is hereby incorporated herein by reference.

[0080] Genetic testing (also called genetic screening or genotyping) can be defined broadly as analyzing the nucleic acid of a subject to determine if the subject carries mutations (or alleles or polymorphisms) that are either (a) associated with, or causative of, a particular clinical phenotype, or (b) that are in ‘linkage disequilibrium’ with a mutation, allele or polymorphism that is associated with or causative of a particular clinical phenotype. One such clinical phenotype is the likelihood that the subject will respond favorably to a given therapeutic treatment.

[0081] Linkage disequilibrium refers to the tendency of specific alleles to occur together more frequently than would be expected by chance. Alleles at given loci are in equilibrium if the frequency of any particular set of alleles (or haplotype) is the product of their individual population frequencies. Disequilibrium may be due to various forces, including selection for certain allele combinations, or a recent mixing of genetically heterogeneous populations. Where markers link tightley to a disease-causing gene, an association of an allele (or a group of linked alleles) with the disease gene is expected if the disease mutation occurred in the recent historical past, so that sufficient time has not elapsed for equilibrium to be achieved through recombination events in the immediate chromosomal region.

[0082] The term ‘marker,’ as used herein, refers to a specific site in the genome which exhibits sequence variations among individuals.

[0083] The term ‘allele’ refers to the different sequence variants found at given markers. The sequence variants may be single or multiple base changes, including insertions, deletions or substitutions or may be variable number of sequence repeats and the like.

[0084] The term ‘linkage disequilibrium’ refers to the co-inheritance of two alleles at frequencies greater than would be expected from the separate frequencies of occurrence of each allele in a given control population. The expected frequency of occurrence of two alleles that are inherited independently is the frequency of the first allele multiplied by the frequency of the second allele. Alleles that co-occur at expected frequencies are said to be in ‘linkage equilibrium.’ It will be apparent to those skilled in the art that the present methods may be carried out with polymorphisms that are in linkage disequilibrium with the specific polymorphisms identified herein.

[0085] The term ‘haplotype’ is a set of alleles that are inherited together as a group (i.e., that are in linkage disequilibrium). It will be apparent to those skilled in the art that the present methods may be utilized as a component of testing for haplotypes that encompass the polymorphisms described herein.

EXAMPLES Example 1 Effects of Polymorphisms in the Promoter Region of 5-Lipoxygenase and LTC4 Synthase on the Clinical Response (Phenotypic Response) to Zafirlukast and Fluticasone

[0086] Asthma subjects were genotyped by two distinct polymorphisms in the promoter regions of 5-lipoxygenase (ALOX5) and LTC4 synthase (LTC4S) genes. The polymorphisms were: the number of Sp1 repeats (n=3, 4, 5 or 6) in the approximate region of 176 to 147 base pairs upstream from the ATG start site in ALOX5 (Sp1), and an adenine to cytosine transversion 444 nucleotides upstream from the first codon in LTC4S (A-444C). Genomic DNA was isolated from blood samples obtained from consenting subjects participating in a 12 week multicenter, randomized, double-blind, double-dummy, parallel study comparing inhaled fluticasone (88 mcg BID) and oral zafirlukast (20 mg BID). Genomic DNA was extracted using standard procedures (automated extraction or using kit formats). The genotypes of the subjects, and any control individuals utilized, were determined for polymorphisms within the ALOX5 or LTC4S gene sequences. Polymorphisms are identifiable using PCR, PCR-RFLP, Taqman allelic discrimination assays, or any other suitable technique as is known in the art. If a specific polymorphism resides in an amplification product that is of sufficient physical size (e.g., an insertion/deletion polymorphism of multiple bases), a simple size discrimination assay can be employed to determine the genotype of an individual. In this case, two primers are employed to specifically amplify the gene of interest in a region surrounding the site of the polymorphism. PCR amplification is carried out, generating products which differ in length, dependent on the genotype (insertion or deletion) they possess. When subjected to gel electrophoresis, the differently sized products are separated, visualized, and the specific genotypes interpreted directly.

[0087] PCR-RFLP (polymerase chain reaction—restriction fragment length polymorphism) assays may also be utilized as is known in the art to detect polymorphisms. For each polymorphic site, a PCR-RFLP assay employs two gene-specific primers to anneal to, and specifically amplify a segment of genomic DNA surrounding the polymorphic site of interest. Following PCR amplification, specific restriction endonuclease enzymes are employed to digest the PCR products produced. The enzyme utilized for an assay is selected due to its specific recognition sequence which it requires to bind to, and cleave the PCR product in the presence/absence of the polymorphism, yielding fragments diagnostic of the specific base present at the polymorphic site. Following cleavage by the restriction enzyme, gel electrophoresis is employed to separate and visualize the fragments produced.

[0088] Taqman assays, as are known in the art, may also be utilized to identify polymorphisms. For each polymorphic site the allelic discrimination assay uses two allele specific probes labeled with a different fluorescent dye at their 5′ ends but with a common quenching agent at their 3′ ends. Both probes have a 3′ phosphate group so that Taq polymerase cannot add nucleotides to them. The allele specific probes comprising the sequence encompassing the polymorphic site and will differ only in the sequence at this site (this is not necessarily true, the allele-specific probes can be shifted relative to each other such that they are not identical in length or composition. However, where they cover the same DNA region they are identical apart from the polymorphic site of interest). The allele specific probes are only capable of hybridizing without mismatches to the appropriate site.

[0089] The allele specific probes are used in conjunction with two primers, one of which hybridizes to the template 5′ of the two specific probes, whilst the other hybridizes to the template 3′ of the two probes. If the allele corresponding to one of the specific probes is present, the specific probe will hybridize perfectly to the template. The Taq polymerase, extending the 5′ primer, will then remove the nucleotides from the specific probe, releasing both the fluorescent dye and the quenching agent. This will result in an increase in the fluorescence from the dye no longer in close proximity to the quenching agent.

[0090] If the allele specific probe hybridizes to the other allele the mismatch at the polymorphic site will inhibit the 5′ to 3′ endonuclease activity of Taq and hence prevent release of the fluorescent dye.

[0091] The AB17700 sequence detection system is used to measure the increase in the fluorescence from each specific dye at the end of the thermal cycling PCR directly in PCR reaction tubes. The information from the reactions is then analyzed. If an individual is homozygous for a particular allele only fluorescence corresponding to the dye from that specific probe will be released, but if the individual is heterozygous, then both dyes will fluoresce.

[0092] Primers and probes used in the present studies were as follows: (SEQ ID NO:6) ALOX5 forward primer: AGGAACAGAC ACCTCGCTGA GGAGAG (SEQ ID NO:7) ALOX5 reverse primer: GAGCAGCGAG CGCCGGGAGC CTCGGC (SEQ ID NO:8) LTC4S-444A probe: CCTGGATGGG GACAGGGAAC AG (SEQ ID NO:9) LTC4S-444C probe: TGGATGGGGA CCGGGAACAG (SEQ ID NO:10) LTC4S forward primer: TCCGCAGAGG AGGGTTTG (SEQ ID NO:11) LTC4S reverse primer: GCTAACTCCT CCACCCACCT T

[0093] All patients met the ATS American Thoracic Society criteria for asthma, had a baseline forced expiratory volume (FEV₁) between 50 and 80% predicted, increased FEV1 by ≧12% following 180 mcg of inhaled albuterol, and had not used inhaled or oral steroids within 6 months of screening. The endpoint predose a.m. FEV₁ results (given in the table below as a % predicted change from baseline) by genotype and by treatment are presented below in Table 1 (see also FIG. 2 for ALOX5; FIG. 3 for LTC4S): TABLE 1 ALOX5 Sp1 LTC4S A-444C 5,5 5,X X,X A/A A/C C/C Fluticasone 14.2 ± 2.7 13.8 ± 2.0 8.3 ± 6.9 13.3 ± 2.3 14.8 ± 2.8 15.3 ± 6.2 n = 44 n = 31 n = 5 n = 49 n = 20 n = 7 Zafirlukast 5.9 ± 1.8* 7.1 ± 3.8 −2.0 ± 3.2 5.3 ± 2.3* 5.9 ± 2.3* −1.8 ± 3.6 n = 44 n = 19 n = 5 n = 34 n = 30 n = 4

[0094] None of the subjects who were homozygous variant at ALOX5 (X/X) were also homozygous variant for LTC4 (C/C). Some subjects were homozygous variant for one gene and heterozygous variant for the other, and others were heterozygous variant for both genes.

[0095] The results indicate that subjects homozygous for variants in the promoter region of either ALOX5 (X,X), or LTC4X (C/C), have a greatly reduced response to the leukotriene receptor antagonist zafirlukast compared to the other genotypes. These genes encode enzymes active in the biosynthesis of sulfidopeptide leukotrienes. The response to fluticasone 88 mcg BID was greater than to zafirlukast 20 mg BID across all genotypes. These results indicate a genetic basis for some of the variability observed in the clinical efficacy of the leukotriene receptor antagonist zafirlukast.

[0096] For ALOX5, it was found that 59.5% of the patients were homozygous wild type, 33.8% were heterozygous, and 6.8% were homozygous variant. These values are consistent with Drazen et al. who found frequencies of 56.1%, 35.1% and 8.8% for ALOS5 homozygous wild type, heterozygous and homozygous variant respectively. The frequencies for the LTC4S gene were 50.0%, 44.1% and 5.90% for wild type homozygous, heterozygous and homozygous variant, respectively. These values are similar to reported values of 43.2, 50.5 and 6.3%, respectively (Sanar, M. et al. The Lancet 1997; 350: 1599-1600).

Example 2 ALOX5 Polymorphisms at Nucleotide Positions 1728 and 1708 Response to Zafirlukast and Fluticasone

[0097] The A to G transversion polymorphism at position 1728 in exon 13 of the ALOX5 gene, and the G to A transversion polymorphism at position −1708, were studied for any association with the FEV1 response to zafirlukast, compared to the inhaled glucocorticoid fluticasone. Both polymorphisms are set forth in In, KH et al., J. Clin. Investigation 99 (5):1130 (1997), the entire disclosure of which is incorporated herein by reference.

[0098] Genotyping was carried out on subjects with asthma participating in a 12 week randomized, double blind, parallel study of fluticasone (88 mcg BID) and the leukotriene receptor antagonist zafirlukast (20 mg BID). Predose FEV1 results (change from baseline in percent predicted) are shown in Table 3. TABLE 3 Fluticasone Zafirlukast Genotype G1708A G/G 15.0 ± 2.3 4.7 ± 1.9* n = 50 n = 46 G/A 12.7 ± 2.3 8.5 ± 3.5 n = 26 n = 18 A/A — 0.7 ± 2.2 n = 0 n = 4 Genotype A1728G A/A 13.6 ± 1.8 6.8 ± 1.7 n = 72 n = 58 A/G 10.8 ± 6.3 −1.9 ± 2.9 n = 8 G/G — 0.8 n = 0 n = 1

[0099] The above results suggest that subjects homozygous for the A allele at the 1708 site (G1708A), or who have one or two G alleles at the 1728 site (A1728G), had reduced response to zafirlukast, compared to alternative genotypes. This result did not reach statistical significance, possibly due to low sample number.

[0100] The G1708A promoter polymorphism was in significant Linkage Disequilibrium (LD) with the Sp1 promoter marker that alters efficacy. The A1728G polymorphism was not in LD with the Sp1 site and therefore may be affecting clinical response independently. The frequency of the G and A alleles for 1708 are 0.82 and 0.18 respectively, and the A and G alleles for 1728 are 0.93 and 0.07 respectively. Both are in Hardy Weinberg equilibrium. These results suggest that variability in clinical response to zafirlukast may be associated with multiple genetic polymorphisms in the leukotriene pathway.

1 16 1 4465 DNA Homo sapiens CDS (1447)..(1504) CDS (2950)..(3049) CDS (3152)..(3222) CDS (3307)..(3388) CDS (3619)..(3757) 1 gagctcacag agcccccagc tggggcatat ctggtttccg ggggcagggg cgatacccag 60 aggaggaaga agggattctg agagagccca acaggctccg agcctcaggc tggagctgag 120 cttggggcag caaggaagga ccaggtgcga gggcagaacc atgcggcccg acccctgcag 180 cacggcctgt ggcctccccc agctcctgcc cgtgcttctg ggtcagtctg gactttgcca 240 cttctgacca aaagccaccg caaacccact caagccaaaa gaggaagtga ccgttaggcc 300 caactgggaa ggctggcggc caggggcact ccaggcaggg cgaggggggc ggccgggggc 360 gctccaggcg gggcgaggga gacacccaga actccaggca ggagtcctcg ggtgccacct 420 ttcctctcca cctggccctg cgtgggctct gtcctcaggg tggcccgccg tagtccccct 480 ccccactctg agtttcctgt cccaaagtcc taaggaagtt tccagaacta catctcacca 540 tcttgagtca gccttggctc agtgtccatc tcacaggcct ggaaggggca ggagtcagca 600 ctgtccagac cacagggcct gagtgtgggg agggcagccg tctaggaagg tggtggaggg 660 ttgttacctt gaggcaagag ggctgcgggg cagaaagaca cagcaggtga ctgttgtggg 720 aggcccaaga gaggcctggg agagggatgg cccacaaggg ctgaccctcc cgccacccag 780 ggggccttgg acaggtttcc tcctggcagg gtggcccttg tgcatggaac ccctacaacg 840 actaaggctg gcaggcatga ggtttcctga aggagaaaga gcttgtgggg cccagtgtgg 900 ctgggggggc gctgggactc cattctgaag ccaaaggcac tgggaagggc ttccgcagag 960 gagggtttgg caggggttgc caggaacagc ctggatgggg acagggaaca gataaggtgg 1020 gtggaggagt tagccgggag cctggggctg gctccagcat gatgtggggg tctgcaaggc 1080 cctggagaaa gtggggtggt gcagcagggg gcacacccac agctggagct gacccagatg 1140 gacagcttgg gctctgccac gcgggactag gcaaggaagg ggcacgaaca agcaggaagt 1200 ggtgaggcgg tctccagcta gctgctctcc cctgcccaga ctttggtttc ctccctgctg 1260 gcttggcctg gctccctggc tctgtgtggt atggtcacac ccccgtgcac cccctccact 1320 gagatggggc ggggagagca ccgaggctgc tcttcctctc ctgggccgtc ctctgagcag 1380 cagacggggc taagcgttcc ccagctcgcc ttcacacaca gcccgtgcca ccacaccgac 1440 ggtacc atg aag gac gag gta gct cta ctg gct gct gtc acc ctc ctg 1488 Met Lys Asp Glu Val Ala Leu Leu Ala Ala Val Thr Leu Leu 1 5 10 gga gtc ctg ctg caa g gtgggctggt tcctatctag gaagagggtg ggccttagat 1544 Gly Val Leu Leu Gln 15 ccctacagct tgccctctgc cccctaggcc caggtggagg gcagaggtgg ggactccagc 1604 ccaggcccaa gctggaagag ggtggggact ttcagggaac tggggggcac ctggctgtga 1664 gagctgtagg acttgggggt ggcaagggtg ccaggacaaa tggtaggata gccatgggct 1724 tggggaagct gatctctgct ctttccagct gtcccctctc tgggcgtccc agcaagcggc 1784 ccccattccc tggctctgct tcaaaggcac ctccatactg ggaccacgtg gagcagggta 1844 gaggtgggac tccttcctcc agccccctaa aaagagcctg cttaatgcct ttctcagact 1904 ggccctaaag gacacattcc ttggccagat atccttgcca cctaagagac accactactc 1964 cacagtgtgt gggctaggat aaggcacagc ctggggaggg ggctctgaag gggctgaaca 2024 gacaggccag cctgacctcc agctgctcct gcactgagct ggatggccac cctgtgacac 2084 ccatctgcag agggcccaga accaaaggtg ccagggctgc aggactcagg gggagatggt 2144 ccgacgggag gtctggggag ggagcgcaca gccagcactg gtctgtgtgt ggtctggcct 2204 ggcctcacct gaccaagaga agggctcctg cccacagaga aactttaggg ccagcccacc 2264 ctctgcaact accccagccc tggggtcctg gggttaggct aggagagtcc cagctgcaac 2324 ctcctgggag caggagagaa ggtgtctgtc agatttaggc ctgggaccgg aatgcaggaa 2384 cagagaaact gaggtttgga ggcacaggga cgcaggcttt agtgatcccg gcctgaggca 2444 gggtcagagg gccctgctgg tgggcgctgg taggtgggtg accagggact gttagctaca 2504 gggagtgtgc ttccttgcac ctgggaggat gcagccagct ctgccctcag actcccgagg 2564 cacttcctgg ccagggacct gaaagctgca tttgcctgtg ttttgagagt gaaatgattc 2624 agaaacaagg actcaagtgg tctctctcgc ggagcaggtg tccctgtgcc tgaatcactc 2684 accctccccc atacactcac aggttgggac agggcctctc tgcgccccag gcttcagccc 2744 tgccctcctc gctgaatgtc agggacacag ggcaggccag ggatgggtga gacgagaggt 2804 ctcctcgggc ggggaggggg cggggttccg ccttagggag gagaggacac ggccaagtga 2864 agggccagat tgcaggatcc ctcccactcc catctctggg gcttcgggtg tccagacctg 2924 actcccgctc cccctcctcc cccag cc tac ttc tcc ctg cag gtg atc tcg 2975 Ala Tyr Phe Ser Leu Gln Val Ile Ser 20 25 gcg cgc agg gcc ttc cgc gtg tcg ccg ccg ctc acc acc ggc cca ccc 3023 Ala Arg Arg Ala Phe Arg Val Ser Pro Pro Leu Thr Thr Gly Pro Pro 30 35 40 gag ttc gag cgc gtc tac cga gcc ca gtgaggcgcg gcgggagggc 3069 Glu Phe Glu Arg Val Tyr Arg Ala Gln 45 50 gcggggcggg gagcgagccc caggcgggtc cgggtcgcag gaccatcccg gccggcgcgc 3129 tcatcccacc cgcccaccgc ag g gtg aac tgc agc gag tac ttc ccg ctg 3179 Val Asn Cys Ser Glu Tyr Phe Pro Leu 55 60 ttc ctc gcc acg ctc tgg gtc gcc ggc atc ttc ttt cat gaa g 3222 Phe Leu Ala Thr Leu Trp Val Ala Gly Ile Phe Phe His Glu 65 70 75 gtcggggtgt ggggcagggg cgcacgcgct ggacccccgg gacccgcgca gggcgctcac 3282 caggcccgtg cgtacctctc gcag gg gcg gcg gcc ctg tgc ggc ctg gtc 3332 Gly Ala Ala Ala Leu Cys Gly Leu Val 80 85 tac ctg ttc gcg cgc ctc cgc tac ttc cag ggc tac gcg cgc tcc gcg 3380 Tyr Leu Phe Ala Arg Leu Arg Tyr Phe Gln Gly Tyr Ala Arg Ser Ala 90 95 100 cag ctc ag gtgagggccg ggcggggagc ggggcggggc cggggaaaga 3428 Gln Leu Arg tcgcgggcgg gcggggctcc tggggagcgg gaccgaagct gggggcgggc gacgggccgg 3488 agcccagcgc ctttggggat tcggtgggcg agccctggcg gcggccagag gaagtccccg 3548 tggggccagg gttgcggcgg ggaagaagcg ggcctcctcg cgccacctcc ccgctgaccg 3608 ccgcccgcag g ctg gca ccg ctg tac gcg agc gcg cgc gcc ctc tgg ctg 3658 Leu Ala Pro Leu Tyr Ala Ser Ala Arg Ala Leu Trp Leu 105 110 115 ctg gtg gcg ctg gct gcg ctc ggc ctg ctc gcc cac ttc ctc ccg gcc 3706 Leu Val Ala Leu Ala Ala Leu Gly Leu Leu Ala His Phe Leu Pro Ala 120 125 130 gcg ctg cgc gcc gcg ctc ctc gga cgg ctc cgg acg ctg ctg ccg tgg 3754 Ala Leu Arg Ala Ala Leu Leu Gly Arg Leu Arg Thr Leu Leu Pro Trp 135 140 145 gcc tgagaccaag gcccccgggc cgacggagcc gggaaagaag agccggagcc 3807 Ala 150 tccagctgcc ccggggaggg gcgctcgctt ccgcatccta gtctctatca ttaaagttct 3867 agtgaccgag acccgggctg cgttctctgg gtccgcgggg gtggcgcacc gcgggctacg 3927 gagcctggag gggcccagcc cgagtccggg cagcccgggg cgggcttcct agtggcggcg 3987 tgagagtggc tgcgaaggaa cgagccctcc ccctggggcg ggactggatc cggtcttcac 4047 ctcctacccc actccctact cagcctcggg gtcacaaggc cgcccagtcc tgccggggtt 4107 caccctccta gcgctcagcg gtctcctcac cggtccccct cctcaggggc cttccctcga 4167 ctctcagccg ccgcagtccc tcgtcccctg gccttcacag ctgacactag atagagcctg 4227 tggctctctc cccaggtgag ggcaggggtt tttcttttgg tcagcactgg atccccctcg 4287 ttaactgtag gtgttcaggg cagccctccg aggtccgcag agctgcgggc accatgggaa 4347 cgaagtgagt cagtgacagg cggtctcaag gaaatgtcca gaagccttgg ggatccaggg 4407 gaggcccaca gaaacaaaga agtgactttt agccaagtat gcaggagaaa cggaggag 4465 2 150 PRT Homo sapiens 2 Met Lys Asp Glu Val Ala Leu Leu Ala Ala Val Thr Leu Leu Gly Val 1 5 10 15 Leu Leu Gln Ala Tyr Phe Ser Leu Gln Val Ile Ser Ala Arg Arg Ala 20 25 30 Phe Arg Val Ser Pro Pro Leu Thr Thr Gly Pro Pro Glu Phe Glu Arg 35 40 45 Val Tyr Arg Ala Gln Val Asn Cys Ser Glu Tyr Phe Pro Leu Phe Leu 50 55 60 Ala Thr Leu Trp Val Ala Gly Ile Phe Phe His Glu Gly Ala Ala Ala 65 70 75 80 Leu Cys Gly Leu Val Tyr Leu Phe Ala Arg Leu Arg Tyr Phe Gln Gly 85 90 95 Tyr Ala Arg Ser Ala Gln Leu Arg Leu Ala Pro Leu Tyr Ala Ser Ala 100 105 110 Arg Ala Leu Trp Leu Leu Val Ala Leu Ala Ala Leu Gly Leu Leu Ala 115 120 125 His Phe Leu Pro Ala Ala Leu Arg Ala Ala Leu Leu Gly Arg Leu Arg 130 135 140 Thr Leu Leu Pro Trp Ala 145 150 3 20 DNA Homo sapiens 3 ctggatgggg acagggaaca 20 4 20 DNA Homo sapiens 4 ctggatgggg accgggaaca 20 5 2189 DNA Homo sapiens 5 ggatccagaa taaccaaaac aatattgaaa aataaagaac agcgttggtg gattaacatt 60 ttccaatttc aaaacttact atagcactgc ggtaatcaag cagtgtggca ctgtatagca 120 tgtacattac agatcagtgg actagaatca atgtccagaa ataaaccgtt atgtttataa 180 tgaattactt tttaataagg tgtcaagaca acgcaatggg aaaagaataa tgaattcaac 240 aaatgatgca tggacaaccg gacatgcaca tgcaacacaa tgaatttgaa ttcttctatc 300 gctccatgca taaaaactaa ctcaaaatgg gtcacggatg taaatgaaaa gctaaaacta 360 taataatcct agaggaaaac ctaggagtaa atctttaaga tgttattgta ggcagtggtt 420 tctcagatag gaccccaaaa tcacaagcga caaaaagaaa ttggacttaa agttaaatac 480 ttttgtgctt caaacatcat caagaaagtg aaaacacaac ccgcagaagc aataaaaatg 540 tctgtaagtc atgtatccga ttagagactt ctatccagga tatataaata atgcaattca 600 atgataaaaa agataaatag cccagttttc caaagagtca agcatctgaa tatacatctc 660 tccaaaaata tacagatatc caacaagcat gtgaaaagat gttcaaagcc atttgccagg 720 tgcacaaacc caagacagta tgaggagatg ctacagggac tctgctgctt cacagacatg 780 aagcgttggt gagaatgtag gcagccgcct ttggggactt cacatccccg ccgccccacg 840 cacggtgagc tagtgtttaa acttagccga gatcaataca cgcgactgtg tgcccgtcag 900 accctgcgct gccggcgggg ctgggagagg cgggcgccag gagtgggcgg gaacctgggg 960 gtcaggcccc agccgcggga agcgcgccca ggagcgcgcg aaaccttctc cacacccttc 1020 caggcatttg cccgccgcga ttcagagagc cgacccgtga cccctggcct cccctagaca 1080 gccccgcatg tccagatgtg ccgtcccgcc tgcctcccgc gaccactggc catctctggg 1140 cctgggcgcg gttctcggcg cccggcctgc ccccgccagg agccgcaggt ccagccagtg 1200 aagaagcccg cgcctgaagg agcctctgtg ctccagaatc catcctcagt atcagcgctg 1260 gggtggcctc ctccaggaag cccttctgat tctctcatgg gtcgctcttc ctctgcagac 1320 tcccggagca ccccctgctc caagtaccgc aagtggcact gagaacttgg ggagagcaga 1380 ggctgtgcct agatttgtag ggagtccccg cagctccacc ccagggccta caggagcctg 1440 gccttgggcg aagccgaggc aggcaggcag ggcaaagggt ggaagcaatt caggagagaa 1500 cgagtgaacg aatggatgag gggtggcagc cgaggttgcc ccagtcccct ggctgcagga 1560 acagacacct cgctgaggag agacccagga gcgaggcccc tgccccgccc gaggcgaggt 1620 cccgcccagt cggcgccgcg cgtgaagagt gggagagaag tactgcgggg gcgggggcgg 1680 gggcgggggc gggggcgggg gcagccggga gcctggagcc agaccggggc ggggccggga 1740 ccggggccag ggaccagtgg tgggaggagg ctgcggcgct agatgcggac acctggaccg 1800 ccgcgccgag gctcccggcg ctcgctgctc ccgcggcccg cgccatgccc tcctacacgg 1860 tcaccgtggc cactggcagc cagtggttcg ccggcactga cgactacatc tacctcagcc 1920 tcgtgggctc ggcgggctgc agcgagaagc acctgctgga caagcccttc tacaacgact 1980 tcgagcgtgg cgcggtgagc gcgggcgggg cacgggtgga gcgcgggctg aggtgcgtcc 2040 gggacccggt ttggacggca gaggcctggg cgggggcgcc gagggcccgt cggggcggcc 2100 cggacaggac tgggggtgtc caggaccctg tcagggaggg cagaactgcg gtggggcgtg 2160 ccctgggctc ccagtggccg gtgggtacc 2189 6 26 DNA Artificial Sequence ALOX5 forward primer 6 aggaacagac acctcgctga ggagag 26 7 26 DNA Artificial Sequence ALOX5 reverse primer 7 gagcagcgag cgccgggagc ctcggc 26 8 22 DNA Artificial Sequence LTC4S -444A probe 8 cctggatggg gacagggaac ag 22 9 20 DNA Artificial Sequence LTC4S - -444C probe 9 tggatgggga ccgggaacag 20 10 18 DNA Artificial Sequence LTC4S forward primer 10 tccgcagagg agggtttg 18 11 21 DNA Artificial Sequence LTC4S reverse primer 11 gctaactcct ccacccacct t 21 12 6 DNA Artificial Sequence Sp1 binding site motif 12 gggcgg 6 13 2497 DNA Homo sapiens CDS (45)..(2069) 13 gggcgccgag gctccccgcc gctcgctgct ccccggcccg cgcc atg ccc tcc tac 56 Met Pro Ser Tyr 1 acg gtc acc gtg gcc act ggc agc cag tgg ttc gcc ggc act gac gac 104 Thr Val Thr Val Ala Thr Gly Ser Gln Trp Phe Ala Gly Thr Asp Asp 5 10 15 20 tac atc tac ctc agc ctc gtg ggc tcg gcg ggc tgc agc gag aag cac 152 Tyr Ile Tyr Leu Ser Leu Val Gly Ser Ala Gly Cys Ser Glu Lys His 25 30 35 ctg ctg gac aag ccc ttc tac aac gac ttc gag cgt ggc gcg gtg gat 200 Leu Leu Asp Lys Pro Phe Tyr Asn Asp Phe Glu Arg Gly Ala Val Asp 40 45 50 tca tac gac gtg act gtg gac gag gaa ctg ggc gag atc cag ctg gtc 248 Ser Tyr Asp Val Thr Val Asp Glu Glu Leu Gly Glu Ile Gln Leu Val 55 60 65 aga atc gag aag cgc aag tac tgg ctg aat gac gac tgg tac ctg aag 296 Arg Ile Glu Lys Arg Lys Tyr Trp Leu Asn Asp Asp Trp Tyr Leu Lys 70 75 80 tac atc acg ctg aag acg ccc cac ggg gac tac atc gag ttc ccc tgc 344 Tyr Ile Thr Leu Lys Thr Pro His Gly Asp Tyr Ile Glu Phe Pro Cys 85 90 95 100 tac cgc tgg atc acc ggc gat gtc gag gtt gtc ctg agg gat gga cgc 392 Tyr Arg Trp Ile Thr Gly Asp Val Glu Val Val Leu Arg Asp Gly Arg 105 110 115 gca aag ttg gcc cga gat gac caa att cac att ctc aag caa cac cga 440 Ala Lys Leu Ala Arg Asp Asp Gln Ile His Ile Leu Lys Gln His Arg 120 125 130 cgt aaa gaa ctg gaa aca cgg caa aaa caa tat cga tgg atg gag tgg 488 Arg Lys Glu Leu Glu Thr Arg Gln Lys Gln Tyr Arg Trp Met Glu Trp 135 140 145 aac cct ggc ttc ccc ttg agc atc gat gcc aaa tgc cac aag gat tta 536 Asn Pro Gly Phe Pro Leu Ser Ile Asp Ala Lys Cys His Lys Asp Leu 150 155 160 ccc cgt gat atc cag ttt gat agt gaa aaa gga gtg gac ttt gtt ctg 584 Pro Arg Asp Ile Gln Phe Asp Ser Glu Lys Gly Val Asp Phe Val Leu 165 170 175 180 aat tac tcc aaa gcg atg gag aac ctg ttc atc aac cgc ttc atg cac 632 Asn Tyr Ser Lys Ala Met Glu Asn Leu Phe Ile Asn Arg Phe Met His 185 190 195 atg ttc cag tct tct tgg aat gac ttc gcc gac ttt gag aaa atc ttt 680 Met Phe Gln Ser Ser Trp Asn Asp Phe Ala Asp Phe Glu Lys Ile Phe 200 205 210 gtc aag atc agc aac act att tct gag cgg gtc atg aat cac tgg cag 728 Val Lys Ile Ser Asn Thr Ile Ser Glu Arg Val Met Asn His Trp Gln 215 220 225 gaa gac ctg atg ttt ggc tac cag ttc ctg aat ggc tgc aac cct gtg 776 Glu Asp Leu Met Phe Gly Tyr Gln Phe Leu Asn Gly Cys Asn Pro Val 230 235 240 ttg atc cgg cgc tgc aca gag ctg ccc gag aag ctc ccg gtg acc acg 824 Leu Ile Arg Arg Cys Thr Glu Leu Pro Glu Lys Leu Pro Val Thr Thr 245 250 255 260 gag atg gta gag tgc agc ctg gag cgg cag ctc agc ttg gag cag gag 872 Glu Met Val Glu Cys Ser Leu Glu Arg Gln Leu Ser Leu Glu Gln Glu 265 270 275 gtc cag caa ggg aac att ttc atc gtg gac ttt gag ctg ctg gat ggc 920 Val Gln Gln Gly Asn Ile Phe Ile Val Asp Phe Glu Leu Leu Asp Gly 280 285 290 atc gat gcc aac aaa aca gac ccc tgc aca ctc cag ttc ctg gcc gct 968 Ile Asp Ala Asn Lys Thr Asp Pro Cys Thr Leu Gln Phe Leu Ala Ala 295 300 305 ccc atc tgc ttg ctg tat aag aac ctg gcc aac aag att gtc ccc att 1016 Pro Ile Cys Leu Leu Tyr Lys Asn Leu Ala Asn Lys Ile Val Pro Ile 310 315 320 gcc atc cag ctc aac caa atc ccg gga gat gag aac cct att ttc ctc 1064 Ala Ile Gln Leu Asn Gln Ile Pro Gly Asp Glu Asn Pro Ile Phe Leu 325 330 335 340 cct tcg gat gca aaa tac gac tgg ctt ttg gcc aaa atc tgg gtg cgt 1112 Pro Ser Asp Ala Lys Tyr Asp Trp Leu Leu Ala Lys Ile Trp Val Arg 345 350 355 tcc agt gac ttc cac gtc cac cag acc atc acc cac ctt ctg cga aca 1160 Ser Ser Asp Phe His Val His Gln Thr Ile Thr His Leu Leu Arg Thr 360 365 370 cat ctg gtg tct gag gtt ttt ggc att gca atg tac cgc cag ctg cct 1208 His Leu Val Ser Glu Val Phe Gly Ile Ala Met Tyr Arg Gln Leu Pro 375 380 385 gct gtg cac ccc att ttc aag ctg ctg gtg gca cac gtg aga ttc acc 1256 Ala Val His Pro Ile Phe Lys Leu Leu Val Ala His Val Arg Phe Thr 390 395 400 att gca atc aac acc aag gcc cgt gag cag ctc atc tgc gag tgt ggc 1304 Ile Ala Ile Asn Thr Lys Ala Arg Glu Gln Leu Ile Cys Glu Cys Gly 405 410 415 420 ctc ttt gac aag gcc aac gcc aca ggg ggc ggt ggg cac gtg cag atg 1352 Leu Phe Asp Lys Ala Asn Ala Thr Gly Gly Gly Gly His Val Gln Met 425 430 435 gtg cag agg gcc atg aag gac ctg acc tat gcc tcc ctg tgc ttt ccc 1400 Val Gln Arg Ala Met Lys Asp Leu Thr Tyr Ala Ser Leu Cys Phe Pro 440 445 450 gag gcc atc aag gcc cgg ggc atg gag agc aaa gaa gac atc ccc tac 1448 Glu Ala Ile Lys Ala Arg Gly Met Glu Ser Lys Glu Asp Ile Pro Tyr 455 460 465 tac ttc tac cgg gac gac ggg ctc ctg gtg tgg gaa gcc atc agg acg 1496 Tyr Phe Tyr Arg Asp Asp Gly Leu Leu Val Trp Glu Ala Ile Arg Thr 470 475 480 ttc acg gcc gag gtg gta gac atc tac tac gag ggc gac cag gtg gtg 1544 Phe Thr Ala Glu Val Val Asp Ile Tyr Tyr Glu Gly Asp Gln Val Val 485 490 495 500 gag gag gac ccg gag ctg cag gac ttc gtg aac gat gtc tac gtg tac 1592 Glu Glu Asp Pro Glu Leu Gln Asp Phe Val Asn Asp Val Tyr Val Tyr 505 510 515 ggc atg cgg ggc cgc aag tcc tca ggc ttc ccc aag tcg gtc aag agc 1640 Gly Met Arg Gly Arg Lys Ser Ser Gly Phe Pro Lys Ser Val Lys Ser 520 525 530 cgg gag cag ctg tcg gag tac ctg acc gtg gtg atc ttc acc gcc tcc 1688 Arg Glu Gln Leu Ser Glu Tyr Leu Thr Val Val Ile Phe Thr Ala Ser 535 540 545 gcc cag cac gcc gcg gtc aac ttc ggc cag tac gac tgg tgc tcc tgg 1736 Ala Gln His Ala Ala Val Asn Phe Gly Gln Tyr Asp Trp Cys Ser Trp 550 555 560 atc ccc aat gcg ccc cca acc atg cga gcc ccg cca ccg act gcc aag 1784 Ile Pro Asn Ala Pro Pro Thr Met Arg Ala Pro Pro Pro Thr Ala Lys 565 570 575 580 ggc gtg gtg acc att gag cag atc gtg gac acg ctg ccc gac cgc ggc 1832 Gly Val Val Thr Ile Glu Gln Ile Val Asp Thr Leu Pro Asp Arg Gly 585 590 595 cgc tcc tgc tgg cat ctg ggt gca gtg tgg gcg ctg agc cag ttc cag 1880 Arg Ser Cys Trp His Leu Gly Ala Val Trp Ala Leu Ser Gln Phe Gln 600 605 610 gaa aac gag ctg ttc ctg ggc atg tac cca gaa gag cat ttt atc gag 1928 Glu Asn Glu Leu Phe Leu Gly Met Tyr Pro Glu Glu His Phe Ile Glu 615 620 625 aag cct gtg aag gaa gcc atg gcc cga ttc cgc aag aac ctc gag gcc 1976 Lys Pro Val Lys Glu Ala Met Ala Arg Phe Arg Lys Asn Leu Glu Ala 630 635 640 att gtc agc gtg att gct gag cgc aac aag aag aag cag ctg cca tat 2024 Ile Val Ser Val Ile Ala Glu Arg Asn Lys Lys Lys Gln Leu Pro Tyr 645 650 655 660 tac tac ttg tcc cca gac cgg att ccg aac agt gtg gcc atc tga 2069 Tyr Tyr Leu Ser Pro Asp Arg Ile Pro Asn Ser Val Ala Ile 665 670 gcacactgcc agtctcactg tgggaaggcc agctgcccca gccagatgga ctccagcctg 2129 cctggcaggc tgtctggcca ggcctcttgg cagtcacatc tcttcctccg aggccagtac 2189 ctttccattt attctttgat cttcagggaa ctgcatagat tgtatcaaag tgtaaacacc 2249 atagggaccc attctacaca gagcaggact gcacaggcgt cctgtccaca cccagctcag 2309 catttccaca ccaagcagca acagcaaatc acgaccactg atagatgtct attcttgttg 2369 gagacatggg atgattattt tctgttctat ttgtgcttag tccaattcct tgcacatagt 2429 aggtacccaa ttcaattact attgaatgaa ttaagaattg gttgccataa aaataaatca 2489 gttcattt 2497 14 674 PRT Homo sapiens 14 Met Pro Ser Tyr Thr Val Thr Val Ala Thr Gly Ser Gln Trp Phe Ala 1 5 10 15 Gly Thr Asp Asp Tyr Ile Tyr Leu Ser Leu Val Gly Ser Ala Gly Cys 20 25 30 Ser Glu Lys His Leu Leu Asp Lys Pro Phe Tyr Asn Asp Phe Glu Arg 35 40 45 Gly Ala Val Asp Ser Tyr Asp Val Thr Val Asp Glu Glu Leu Gly Glu 50 55 60 Ile Gln Leu Val Arg Ile Glu Lys Arg Lys Tyr Trp Leu Asn Asp Asp 65 70 75 80 Trp Tyr Leu Lys Tyr Ile Thr Leu Lys Thr Pro His Gly Asp Tyr Ile 85 90 95 Glu Phe Pro Cys Tyr Arg Trp Ile Thr Gly Asp Val Glu Val Val Leu 100 105 110 Arg Asp Gly Arg Ala Lys Leu Ala Arg Asp Asp Gln Ile His Ile Leu 115 120 125 Lys Gln His Arg Arg Lys Glu Leu Glu Thr Arg Gln Lys Gln Tyr Arg 130 135 140 Trp Met Glu Trp Asn Pro Gly Phe Pro Leu Ser Ile Asp Ala Lys Cys 145 150 155 160 His Lys Asp Leu Pro Arg Asp Ile Gln Phe Asp Ser Glu Lys Gly Val 165 170 175 Asp Phe Val Leu Asn Tyr Ser Lys Ala Met Glu Asn Leu Phe Ile Asn 180 185 190 Arg Phe Met His Met Phe Gln Ser Ser Trp Asn Asp Phe Ala Asp Phe 195 200 205 Glu Lys Ile Phe Val Lys Ile Ser Asn Thr Ile Ser Glu Arg Val Met 210 215 220 Asn His Trp Gln Glu Asp Leu Met Phe Gly Tyr Gln Phe Leu Asn Gly 225 230 235 240 Cys Asn Pro Val Leu Ile Arg Arg Cys Thr Glu Leu Pro Glu Lys Leu 245 250 255 Pro Val Thr Thr Glu Met Val Glu Cys Ser Leu Glu Arg Gln Leu Ser 260 265 270 Leu Glu Gln Glu Val Gln Gln Gly Asn Ile Phe Ile Val Asp Phe Glu 275 280 285 Leu Leu Asp Gly Ile Asp Ala Asn Lys Thr Asp Pro Cys Thr Leu Gln 290 295 300 Phe Leu Ala Ala Pro Ile Cys Leu Leu Tyr Lys Asn Leu Ala Asn Lys 305 310 315 320 Ile Val Pro Ile Ala Ile Gln Leu Asn Gln Ile Pro Gly Asp Glu Asn 325 330 335 Pro Ile Phe Leu Pro Ser Asp Ala Lys Tyr Asp Trp Leu Leu Ala Lys 340 345 350 Ile Trp Val Arg Ser Ser Asp Phe His Val His Gln Thr Ile Thr His 355 360 365 Leu Leu Arg Thr His Leu Val Ser Glu Val Phe Gly Ile Ala Met Tyr 370 375 380 Arg Gln Leu Pro Ala Val His Pro Ile Phe Lys Leu Leu Val Ala His 385 390 395 400 Val Arg Phe Thr Ile Ala Ile Asn Thr Lys Ala Arg Glu Gln Leu Ile 405 410 415 Cys Glu Cys Gly Leu Phe Asp Lys Ala Asn Ala Thr Gly Gly Gly Gly 420 425 430 His Val Gln Met Val Gln Arg Ala Met Lys Asp Leu Thr Tyr Ala Ser 435 440 445 Leu Cys Phe Pro Glu Ala Ile Lys Ala Arg Gly Met Glu Ser Lys Glu 450 455 460 Asp Ile Pro Tyr Tyr Phe Tyr Arg Asp Asp Gly Leu Leu Val Trp Glu 465 470 475 480 Ala Ile Arg Thr Phe Thr Ala Glu Val Val Asp Ile Tyr Tyr Glu Gly 485 490 495 Asp Gln Val Val Glu Glu Asp Pro Glu Leu Gln Asp Phe Val Asn Asp 500 505 510 Val Tyr Val Tyr Gly Met Arg Gly Arg Lys Ser Ser Gly Phe Pro Lys 515 520 525 Ser Val Lys Ser Arg Glu Gln Leu Ser Glu Tyr Leu Thr Val Val Ile 530 535 540 Phe Thr Ala Ser Ala Gln His Ala Ala Val Asn Phe Gly Gln Tyr Asp 545 550 555 560 Trp Cys Ser Trp Ile Pro Asn Ala Pro Pro Thr Met Arg Ala Pro Pro 565 570 575 Pro Thr Ala Lys Gly Val Val Thr Ile Glu Gln Ile Val Asp Thr Leu 580 585 590 Pro Asp Arg Gly Arg Ser Cys Trp His Leu Gly Ala Val Trp Ala Leu 595 600 605 Ser Gln Phe Gln Glu Asn Glu Leu Phe Leu Gly Met Tyr Pro Glu Glu 610 615 620 His Phe Ile Glu Lys Pro Val Lys Glu Ala Met Ala Arg Phe Arg Lys 625 630 635 640 Asn Leu Glu Ala Ile Val Ser Val Ile Ala Glu Arg Asn Lys Lys Lys 645 650 655 Gln Leu Pro Tyr Tyr Tyr Leu Ser Pro Asp Arg Ile Pro Asn Ser Val 660 665 670 Ala Ile 15 2420 DNA Homo sapiens CDS (3)..(1994) 15 ct tca ccc cgt ggt gaa gac act gac gac tac atc tac ctc agc ctc 47 Ser Pro Arg Gly Glu Asp Thr Asp Asp Tyr Ile Tyr Leu Ser Leu 1 5 10 15 gtg ggc tcg gcg ggc tgc agc gag aag cac ctg ctg gac aag ccc ttc 95 Val Gly Ser Ala Gly Cys Ser Glu Lys His Leu Leu Asp Lys Pro Phe 20 25 30 tac aac gac ttc gag cgt ggc gcg gtg gat tca tac gac gtg act gtg 143 Tyr Asn Asp Phe Glu Arg Gly Ala Val Asp Ser Tyr Asp Val Thr Val 35 40 45 gac gag gaa ctg ggc gag atc cag ctg gtc aga atc gag aag cgc aag 191 Asp Glu Glu Leu Gly Glu Ile Gln Leu Val Arg Ile Glu Lys Arg Lys 50 55 60 tac tgg ctg aat gac gac tgg tac ctg aag tac atc acg ctg aag acg 239 Tyr Trp Leu Asn Asp Asp Trp Tyr Leu Lys Tyr Ile Thr Leu Lys Thr 65 70 75 ccc cac ggg gac tac atc gag ttc ccc tgc tac cgc tgg atc acc ggc 287 Pro His Gly Asp Tyr Ile Glu Phe Pro Cys Tyr Arg Trp Ile Thr Gly 80 85 90 95 gat gtc gag gtt gtc ctg agg gat gga cgc gca aag ttg gcc cga gat 335 Asp Val Glu Val Val Leu Arg Asp Gly Arg Ala Lys Leu Ala Arg Asp 100 105 110 gac caa att cac att ctc aag caa cac cga cgt aaa gaa ctg gaa aca 383 Asp Gln Ile His Ile Leu Lys Gln His Arg Arg Lys Glu Leu Glu Thr 115 120 125 cgg caa aaa caa tat cga tgg atg gag tgg aac cct ggc ttc ccc ttg 431 Arg Gln Lys Gln Tyr Arg Trp Met Glu Trp Asn Pro Gly Phe Pro Leu 130 135 140 agc atc gat gcc aaa tgc cac aag gat tta ccc cgt gat atc cag ttt 479 Ser Ile Asp Ala Lys Cys His Lys Asp Leu Pro Arg Asp Ile Gln Phe 145 150 155 gat agt gaa aaa gga gtg gac ttt gtt ctg aat tac tcc aaa gcg atg 527 Asp Ser Glu Lys Gly Val Asp Phe Val Leu Asn Tyr Ser Lys Ala Met 160 165 170 175 gag aac ctg ttc atc aac cgc ttc atg cac atg ttc cag tct tct tgg 575 Glu Asn Leu Phe Ile Asn Arg Phe Met His Met Phe Gln Ser Ser Trp 180 185 190 aat gac ttc gcc gac ttt gag aaa atc ttt gtc aag atc agc aac act 623 Asn Asp Phe Ala Asp Phe Glu Lys Ile Phe Val Lys Ile Ser Asn Thr 195 200 205 att tct gag cgg gtc atg aat cac tgg cag gaa gac ctg atg ttt ggc 671 Ile Ser Glu Arg Val Met Asn His Trp Gln Glu Asp Leu Met Phe Gly 210 215 220 tac cag ttc ctg aat ggc tgc aac cct gtg ttg atc cgg cgc tgc aca 719 Tyr Gln Phe Leu Asn Gly Cys Asn Pro Val Leu Ile Arg Arg Cys Thr 225 230 235 gag ctg ccc gag aag ctc ccg gtg acc acg gag atg gta gag tgc agc 767 Glu Leu Pro Glu Lys Leu Pro Val Thr Thr Glu Met Val Glu Cys Ser 240 245 250 255 ctg gag cgg cag ctc agc ttg gag cag gag gtc cag caa ggg aac att 815 Leu Glu Arg Gln Leu Ser Leu Glu Gln Glu Val Gln Gln Gly Asn Ile 260 265 270 ttc atc gtg gac ttt gag ctg ctg gat ggc atc gat gcc aac aaa aca 863 Phe Ile Val Asp Phe Glu Leu Leu Asp Gly Ile Asp Ala Asn Lys Thr 275 280 285 gac ccc tgc aca ctc cag ttc ctg gcc gct ccc atc tgc ttg ctg tat 911 Asp Pro Cys Thr Leu Gln Phe Leu Ala Ala Pro Ile Cys Leu Leu Tyr 290 295 300 aag aac ctg gcc aac aag att gtc ccc att gcc atc cag ctc aac caa 959 Lys Asn Leu Ala Asn Lys Ile Val Pro Ile Ala Ile Gln Leu Asn Gln 305 310 315 atc ccg gga gat gag aac cct att ttc ctc cct tcg gat gca aaa tac 1007 Ile Pro Gly Asp Glu Asn Pro Ile Phe Leu Pro Ser Asp Ala Lys Tyr 320 325 330 335 gac tgg ctt ttg gcc aaa atc tgg gtg cgt tcc agt gac ttc cac gtc 1055 Asp Trp Leu Leu Ala Lys Ile Trp Val Arg Ser Ser Asp Phe His Val 340 345 350 cac cag acc atc acc cac ctt ctg cga aca cat ctg gtg tct gag gtt 1103 His Gln Thr Ile Thr His Leu Leu Arg Thr His Leu Val Ser Glu Val 355 360 365 ttt ggc att gca atg tac cgc cag ctg cct gct gtg cac ccc att ttc 1151 Phe Gly Ile Ala Met Tyr Arg Gln Leu Pro Ala Val His Pro Ile Phe 370 375 380 aag ctg ctg gtg gca cac gtg aga ttc acc att gca atc aac acc aag 1199 Lys Leu Leu Val Ala His Val Arg Phe Thr Ile Ala Ile Asn Thr Lys 385 390 395 gcc cgt gag cag ctc atc tgc gag tgt ggc ctc ttt gac aag gcc aac 1247 Ala Arg Glu Gln Leu Ile Cys Glu Cys Gly Leu Phe Asp Lys Ala Asn 400 405 410 415 gcc aca ggg ggc ggt ggg cac gtg cag atg gtg cag agg gcc atg aag 1295 Ala Thr Gly Gly Gly Gly His Val Gln Met Val Gln Arg Ala Met Lys 420 425 430 gac ctg acc tat gcc tcc ctg tgc ttt ccc gag gcc atc aag gcc cgg 1343 Asp Leu Thr Tyr Ala Ser Leu Cys Phe Pro Glu Ala Ile Lys Ala Arg 435 440 445 ggc atg gag agc aaa gaa gac atc ccc tac tac ttc tac cgg gac gac 1391 Gly Met Glu Ser Lys Glu Asp Ile Pro Tyr Tyr Phe Tyr Arg Asp Asp 450 455 460 ggg ctc ctg gtg tgg gaa gcc atc agg acg ttc acg gcc gag gtg gta 1439 Gly Leu Leu Val Trp Glu Ala Ile Arg Thr Phe Thr Ala Glu Val Val 465 470 475 gac atc tac tac gag ggc gac cag gtg gtg gag gag gac ccg gag ctg 1487 Asp Ile Tyr Tyr Glu Gly Asp Gln Val Val Glu Glu Asp Pro Glu Leu 480 485 490 495 cag gac ttc gtg aac gat gtc tac gtg tac ggc atg cgg ggc cgc aag 1535 Gln Asp Phe Val Asn Asp Val Tyr Val Tyr Gly Met Arg Gly Arg Lys 500 505 510 tcc tca ggc ttc ccc aag tcg gtc aag agc cgg gag cag ctg tcg gag 1583 Ser Ser Gly Phe Pro Lys Ser Val Lys Ser Arg Glu Gln Leu Ser Glu 515 520 525 tac ctg acc gtg gtg atc ttc acc gcc tcc gcc cag cac gcc gcg gtc 1631 Tyr Leu Thr Val Val Ile Phe Thr Ala Ser Ala Gln His Ala Ala Val 530 535 540 aac ttc ggc cag tac gac tgg tgc tcc tgg atc ccc aat gcg ccc cca 1679 Asn Phe Gly Gln Tyr Asp Trp Cys Ser Trp Ile Pro Asn Ala Pro Pro 545 550 555 acc atg cga gcc ccg cca ccg act gcc aag ggc gtg gtg acc att gag 1727 Thr Met Arg Ala Pro Pro Pro Thr Ala Lys Gly Val Val Thr Ile Glu 560 565 570 575 cag atc gtg gac acg ctg ccc gac cgc ggc cgc tcc tgc tgg cat ctg 1775 Gln Ile Val Asp Thr Leu Pro Asp Arg Gly Arg Ser Cys Trp His Leu 580 585 590 ggt gca gtg tgg gcg ctg agc cag ttc cag gaa aac gag ctg ttc ctg 1823 Gly Ala Val Trp Ala Leu Ser Gln Phe Gln Glu Asn Glu Leu Phe Leu 595 600 605 ggc atg tac cca gaa gag cat ttt atc gag aag cct gtg aag gaa gcc 1871 Gly Met Tyr Pro Glu Glu His Phe Ile Glu Lys Pro Val Lys Glu Ala 610 615 620 atg gcc cga ttc cgc aag aac ctc gag gcc att gtc agc gtg att gct 1919 Met Ala Arg Phe Arg Lys Asn Leu Glu Ala Ile Val Ser Val Ile Ala 625 630 635 gag cgc aac aag aag aag cag ctg cca tat tac tac ttg tcc cca gac 1967 Glu Arg Asn Lys Lys Lys Gln Leu Pro Tyr Tyr Tyr Leu Ser Pro Asp 640 645 650 655 cgg att ccg aac agt gtg gcc atc tga gcacactgcc agtctcactg 2014 Arg Ile Pro Asn Ser Val Ala Ile 660 tgggaaggcc agctgcccca gccagatgga ctccagcctg cctggcaggc tgtctggcca 2074 ggcctcttgg cagtcacatc tcttcctccg aggccagtac ctttccattt attctttgat 2134 cttcagggaa ctgcatagat tgatcaaagt gtaaacacca tagggaccca ttctacacag 2194 agcaggactg cacagcgtcc tgtccacacc cagctcagca tttccacacc aagcagcaac 2254 agcaaatcac gaccactgat agatgtctat tcttgttgga gacatgggat gattattttc 2314 tgttctattt gtgcttagtc caattccttg cacatagtag gtacccaatt caattactat 2374 tgaatgaatt aagaattggt tgccataaaa ataaatcagt tcattt 2420 16 663 PRT Homo sapiens 16 Ser Pro Arg Gly Glu Asp Thr Asp Asp Tyr Ile Tyr Leu Ser Leu Val 1 5 10 15 Gly Ser Ala Gly Cys Ser Glu Lys His Leu Leu Asp Lys Pro Phe Tyr 20 25 30 Asn Asp Phe Glu Arg Gly Ala Val Asp Ser Tyr Asp Val Thr Val Asp 35 40 45 Glu Glu Leu Gly Glu Ile Gln Leu Val Arg Ile Glu Lys Arg Lys Tyr 50 55 60 Trp Leu Asn Asp Asp Trp Tyr Leu Lys Tyr Ile Thr Leu Lys Thr Pro 65 70 75 80 His Gly Asp Tyr Ile Glu Phe Pro Cys Tyr Arg Trp Ile Thr Gly Asp 85 90 95 Val Glu Val Val Leu Arg Asp Gly Arg Ala Lys Leu Ala Arg Asp Asp 100 105 110 Gln Ile His Ile Leu Lys Gln His Arg Arg Lys Glu Leu Glu Thr Arg 115 120 125 Gln Lys Gln Tyr Arg Trp Met Glu Trp Asn Pro Gly Phe Pro Leu Ser 130 135 140 Ile Asp Ala Lys Cys His Lys Asp Leu Pro Arg Asp Ile Gln Phe Asp 145 150 155 160 Ser Glu Lys Gly Val Asp Phe Val Leu Asn Tyr Ser Lys Ala Met Glu 165 170 175 Asn Leu Phe Ile Asn Arg Phe Met His Met Phe Gln Ser Ser Trp Asn 180 185 190 Asp Phe Ala Asp Phe Glu Lys Ile Phe Val Lys Ile Ser Asn Thr Ile 195 200 205 Ser Glu Arg Val Met Asn His Trp Gln Glu Asp Leu Met Phe Gly Tyr 210 215 220 Gln Phe Leu Asn Gly Cys Asn Pro Val Leu Ile Arg Arg Cys Thr Glu 225 230 235 240 Leu Pro Glu Lys Leu Pro Val Thr Thr Glu Met Val Glu Cys Ser Leu 245 250 255 Glu Arg Gln Leu Ser Leu Glu Gln Glu Val Gln Gln Gly Asn Ile Phe 260 265 270 Ile Val Asp Phe Glu Leu Leu Asp Gly Ile Asp Ala Asn Lys Thr Asp 275 280 285 Pro Cys Thr Leu Gln Phe Leu Ala Ala Pro Ile Cys Leu Leu Tyr Lys 290 295 300 Asn Leu Ala Asn Lys Ile Val Pro Ile Ala Ile Gln Leu Asn Gln Ile 305 310 315 320 Pro Gly Asp Glu Asn Pro Ile Phe Leu Pro Ser Asp Ala Lys Tyr Asp 325 330 335 Trp Leu Leu Ala Lys Ile Trp Val Arg Ser Ser Asp Phe His Val His 340 345 350 Gln Thr Ile Thr His Leu Leu Arg Thr His Leu Val Ser Glu Val Phe 355 360 365 Gly Ile Ala Met Tyr Arg Gln Leu Pro Ala Val His Pro Ile Phe Lys 370 375 380 Leu Leu Val Ala His Val Arg Phe Thr Ile Ala Ile Asn Thr Lys Ala 385 390 395 400 Arg Glu Gln Leu Ile Cys Glu Cys Gly Leu Phe Asp Lys Ala Asn Ala 405 410 415 Thr Gly Gly Gly Gly His Val Gln Met Val Gln Arg Ala Met Lys Asp 420 425 430 Leu Thr Tyr Ala Ser Leu Cys Phe Pro Glu Ala Ile Lys Ala Arg Gly 435 440 445 Met Glu Ser Lys Glu Asp Ile Pro Tyr Tyr Phe Tyr Arg Asp Asp Gly 450 455 460 Leu Leu Val Trp Glu Ala Ile Arg Thr Phe Thr Ala Glu Val Val Asp 465 470 475 480 Ile Tyr Tyr Glu Gly Asp Gln Val Val Glu Glu Asp Pro Glu Leu Gln 485 490 495 Asp Phe Val Asn Asp Val Tyr Val Tyr Gly Met Arg Gly Arg Lys Ser 500 505 510 Ser Gly Phe Pro Lys Ser Val Lys Ser Arg Glu Gln Leu Ser Glu Tyr 515 520 525 Leu Thr Val Val Ile Phe Thr Ala Ser Ala Gln His Ala Ala Val Asn 530 535 540 Phe Gly Gln Tyr Asp Trp Cys Ser Trp Ile Pro Asn Ala Pro Pro Thr 545 550 555 560 Met Arg Ala Pro Pro Pro Thr Ala Lys Gly Val Val Thr Ile Glu Gln 565 570 575 Ile Val Asp Thr Leu Pro Asp Arg Gly Arg Ser Cys Trp His Leu Gly 580 585 590 Ala Val Trp Ala Leu Ser Gln Phe Gln Glu Asn Glu Leu Phe Leu Gly 595 600 605 Met Tyr Pro Glu Glu His Phe Ile Glu Lys Pro Val Lys Glu Ala Met 610 615 620 Ala Arg Phe Arg Lys Asn Leu Glu Ala Ile Val Ser Val Ile Ala Glu 625 630 635 640 Arg Asn Lys Lys Lys Gln Leu Pro Tyr Tyr Tyr Leu Ser Pro Asp Arg 645 650 655 Ile Pro Asn Ser Val Ala Ile 660 

That which is claimed is:
 1. A method of screening a subject suffering from a respiratory disease that is treatable with a leukotriene receptor antagonist, as an aid in predicting the subject's response to said treatment, comprising: (a) obtaining a sample of DNA from the subject; and (b) determining the genotype of said DNA at a polymorphic allelic site in the 5-lipoxygenase gene and a polymorphic allelic site in the LTC₄ synthase gene, where different genotypes at said sites are associated with different incidences of a phenotypic response to said treatment; wherein the detected genotypes indicate that the subject is likely to have the phenotypic response associated with said genotype.
 2. A method according to claim 1 where said DNA sample is genomic DNA.
 3. A method according to claim 1 where said DNA sample is cDNA.
 4. A method according to claim 1 where said subject suffers from asthma.
 5. A method according to claim 1 where said leukotriene receptor antagonist is a CysLT1 leukotriene receptor antagonist.
 6. A method according to claim 1 where said polymorphic allele is within the 5′ non-coding region of the LTC4S gene.
 7. A method according to claim 6 where said polymorphic allele is a transversion polymorphism in the transcriptional regulatory region of the LTC4S gene.
 8. A method according to claim 6 where said polymorphic allele comprises a sequence selected from SEQ ID NO:3 and SEQ ID NO:4.
 9. A method according to claim 6 where homozygosity for an allele comprising SEQ ID NO:4 indicates that the subject will have a reduced response to treatment with a leukotriene receptor antagonist, compared to a subject having an allele comprising SEQ ID NO:
 3. 10. A method according to claim 1 where said polymorphic allele is within the 5′ noncoding region of the ALOX5 gene.
 11. A method according to claim 10 where said polymorphic allele is a variation in the number of tandem repeats of a Sp-1 binding motif in the 5′ non-coding region of the ALOX5 gene.
 12. A method according to claim 10 where said polymorphic allele comprises three, four, five or six repeats of SEQ ID NO:8.
 13. A method according to claim 10 where the presence of an allele having five repeats of SEQ ID NO:8 indicates that the subject will have an increased response to treatment with a leukotriene receptor antagonist, compared to a subject homozygous for alleles having fewer than or more than five repeats of SEQ ID NO:8.
 14. A method of screening a subject suffering from asthma, as an aid in predicting their response to treatment with a leukotriene receptor antagonist ligand, comprising: a) obtaining a sample of DNA from the subject; and b) genotyping said DNA sample to determine the genotype at a polymorphic allelic site in the 5-lipoxygenase gene and a polymorphic site in the LTC₄ synthase gene, where different genotypes at said sites are associated with different incidences of a phenotypic response to said treatment; wherein the genotype indicates that the subject is likely to have the phenotypic response associated with said genotype.
 15. A method according to claim 14 where said leukotriene receptor antagonist ligand is a CysLT1 leukotriene receptor antagonist.
 16. A method according to claim 14 where said leukotriene receptor antagonist ligand is selected from the group consisting of zafirlukast, prailulast, iralukast and montelukast.
 17. A method according to claim 14 where said polymorphic allele is within the 5′ non-coding region of the LTC4S gene.
 18. A method according to claim 17 where said polymorphic allele is a transversion polymorphism in the transcriptional regulatory region of the LTC4S gene.
 19. A method according to claim 17 where said polymorphic allele comprises a sequence selected from SEQ ID NO:3 and SEQ ID NO:4.
 20. A method according to claim 17 where homozygosity for an allele comprising SEQ ID NO:4 indicates that the subject will have a reduced response to treatment with a leukotriene receptor antagonist, compared to a subject having an allele comprising SEQ ID NO:3.
 21. A method according to claim 14 where said polymorphic allele is within the 5′ noncoding region of the ALOX5 gene.
 22. A method according to claim 21 where said polymorphic allele is a variation in the number of tandem repeats of a Sp-1 binding motif in the 5′ non-coding region of the ALOX5 gene.
 23. A method according to claim 21 where said polymorphic allele comprises three, four, five or six repeats of SEQ ID NO:8.
 24. A method according to claim 21 where the presence of an allele having five repeats of SEQ ID NO:8 indicates that the subject will have an increased response to treatment with a leukotriene receptor antagonist, compared to a subject homozygous for alleles having fewer than or more than five repeats of SEQ ID NO:8.
 25. A method according to claim 14 where the genotype indicates that the subject is less predisposed to relief of asthma symptoms when treated with a leukotriene receptor antagonist, compared to subjects with alternative genotypes.
 26. A method according to claim 14 where the genotype indicates that the subject is more predisposed to relief of asthma symptoms when treated with a leukotriene receptor antagonist, compared to subjects with alternative genotypes.
 27. A method of screening a leukotriene receptor antagonist compound for phenotypic effects in genetic subpopulations of subjects with asthma, comprising: (a) administering said compound to a population of subjects suffering from asthma; (b) obtaining a DNA sample from each of said subjects and genotyping for a polymorphic allele in the ALOX5 gene and a polymorphic allele in the LTC4S gene; and (c) detecting any correlations between the polymorphic allele genotype obtained in step (b) and the occurrence of a phenotypic response in said population of subjects; wherein the detection of a genotype that is correlated with an increased or decreased incidence of a desired therapeutic response, compared to the incidence in subjects with alternative genotypes, indicates that the effectiveness of said compound in treating asthma varies among the genetic subpopulations of said population.
 28. A commercial method of screening a subject suffering from a respiratory disease that is treatable with a leukotriene receptor antagonist, as an aid in predicting the subject's response to said treatment, comprising: (a) obtaining a sample of DNA from the subject; (b) determining the genotype of said DNA at a polymorphic allelic site in the 5-lipoxygenase gene and a polymorphic allelic site in the LTC₄ synthase gene, where different genotypes at said sites are associated with different incidences of a phenotypic response to said treatment; wherein the detected genotype indicates that the subject is likely to have the phenotypic response associated with said genotype; and further wherein any nucleotide sequence data, amino acid sequence data, protein-protein interaction data, clinical diagnosis data or statistics data generated by the above procedure is stored in electronically readable media and is communicated via telecommunication means between at least two electronic computing devices.
 29. A method of identifying, within a population of asthma patients, a subpopulation of asthma patients who are predicted to respond to therapy with a leukotriene receptor antagonist, comprising the step of: (a) obtaining a DNA sample from each of said subjects and genotyping for a polymorphic allele of ALOX5 and a polymorphic allele of LTC4S; (b) wherein the detection of a genotype that is correlated with an increased incidence of a desired therapeutic response to said leukotriene receptor antagonist, compared to the incidence in subjects with alternative genotypes, identifies said subject for inclusion in said subpopulation.
 30. A method of designing novel drug therapies for the treatment of asthma patients by pharmacogenetic stratification of a patient population, comprising the steps of: (a) conducting a first clinical drug trial on a patient population, such that said drug trial identifies an association between an increased incidence of a desired therapeutic response to a leukotriene receptor antagonist, and a polymorphic allele of ALOX5 and a polymorphic allele of LTC4S; (b) separating said patient population in said clinical drug trial into subpopulations of responders and non-responders; (c) conducting a subsequent clinical drug trial on a non-responder patient population such that said subsequent drug trial identifies a subsequent association between a phenotype and a genotype; (d) separating the patient population of step (c) into subsequent responder and subsequent non-responder patient populations; and (e) repeating steps (c) and (d) through as many iterations as desired.
 31. A method of screening a subject suffering from a respiratory disease that is treatable with either a leukotriene receptor antagonist or a glucocorticoid, as an aid in treating the subject with the therapeutic agent having the highest likelihood of achieving an adequate therapeutic response, comprising: (a) obtaining a sample of DNA from a subject suffering from a respiratory disease that is treatable with either a leukotriene receptor antagonist or a glucocorticoid; and (b) determining the genotype of said DNA at a polymorphic allelic site in the 5-lipoxygenase gene and a polymorphic allelic site in the LTC₄ synthase gene, where particular genotypes at said sites are associated with a decreased therapeutic response to leukotriene receptor antagonists; and (c) treating said subject with a glucocorticoid when said DNA contains a genotype that is associated with a decreased therapeutic response to leukotriene receptor antagonists. 